% Encoding: UTF-8
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@inproceedings{faucris.227334323,
author = {Valentini, Luca and Sowoidnich, Thomas and da Silva, Julio Cesar and Schulbert, Christian and Naber, Christoph and Neubauer, Jürgen and Bellmann, Frank},
booktitle = {ESRF Coherence Workshop},
date = {2019-09-09/2019-09-13},
editor = {ESRF},
faupublication = {yes},
peerreviewed = {unknown},
title = {{3D} morphological analysis of cement over the first 24 hours of hydration by holographic and near-field ptychographic-tomography},
venue = {Grenoble},
year = {2019}
}
@article{faucris.228994686,
abstract = {QXRD, calorimetry and pore water analysis were performed, to gain insight into accelerating mechanism of Li2CO3 on CA-cement with CaCO3 (filler and reactant) and investigate its impact on phase formation. Data were combined with thermodynamic modeling (PhreeqC and GEMS) to gain the equilibrium phase assemblage for comparison. Acceleration was reached by adding 0.05 wt% Li2CO3 to a CA-CaCO3 mix. Early increase of pH during hydration and higher pH after the main reaction were observed by adding Li2CO3. Total heat of hydration after 20 h was higher in the sample without Li2CO3. The determined crystalline hydrate content disclosed significant differences. The reference mixture showed 8 wt% CAH10 while there was none in the mixture accelerated by Li2CO3. The detected amount of monocarbonate (CO2-AFm) after 20 h was doubled when accelerated by Li2CO3. Formation of a layered double hydroxide, formula [Al2Li(OH)6]2·X·nH2O (with X = ½·CO3 2− or OH−), acting as catalyst was considered.},
author = {Manninger, Tanja and Jansen, Daniel and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2019.105897},
faupublication = {yes},
journal = {Cement and Concrete Research},
note = {CRIS-Team Scopus Importer:2019-11-12},
peerreviewed = {Yes},
title = {{Accelerating} effect of {Li2CO3} on formation of monocarbonate and {Al}-hydroxide in a {CA}-cement and calcite mix during early hydration},
volume = {126},
year = {2019}
}
@article{faucris.201208351,
abstract = {In dry-mortar-formulations calcium aluminate cement (CAC) is often used as a set accelerator for ordinary Portland cement (OPC). However, a critical amount of CAC is able to delay not only the silicate reaction but also the renewed C3A dissolution of an OPC. This delay can be counteracted by adding an appropriate amount of calcium sulfate (C$) to the mix OPC/CAC. The initial hydration period is dominated by fast ettringite formation from CA (CAC) and CaSO4 from OPC generating early strength. High aluminum and low calcium concentrations in the pore solution probably hinder C-S-H seeding and precipitation, thus preventing alite dissolution. Aluminum has to be initially removed by precipitating hydrate phases to change the pore solution chemistry. The start of the silicate reaction is then induced by increasing the calcium concentration in the pore solution.
2 solution). Lattice parameters and the water content in the channel region of the structure (site occupancy factor of the water molecule not bonded to cations) as well as microstructure parameters (size and strain) were determined from a Rietveld refinement on synchrotron powder diffraction data. Local environment of sulphate anions and of the hydrogen bonding network was characterized by Raman spectroscopy. Both techniques led to the same conclusion: the "wet" ettringite sample immersed in the mother solution from the synthesis presents similar structural features as ettringite dried to 35% relative humidity. An increase of the a lattice parameter combined with a decrease of the c lattice parameter occurs on drying. The amount of structural water, the point symmetry of sulphate and the hydrogen bond network are unchanged when passing from the wet to the dried ettringite powder. Ettringite does not form a high-hydrate polymorph in equilibrium with alkaline solution, in contrast to the AFm phases that lose water molecules on drying. According to these results we conclude that ettringite precipitated in aqueous solution at the early hydration stages is of the same chemical composition as ettringite present in the hardening concrete. © 2009 Elsevier Ltd. All rights reserved.},
author = {Renaudin, G. and Filinchuk, Y. and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2009.11.002},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Crystal structure (B); Ettringite (D); Hydration (A); Raman spectroscopy (B); X-ray diffraction (B)},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.acompa},
pages = {370-375},
peerreviewed = {Yes},
title = {{A} comparative structural study of wet and dried ettringite},
volume = {40},
year = {2010}
}
@article{faucris.266494636,
abstract = {The effects of two alkanolamines, triethanolamine (TEA) and diethanol-isopropanolamine (DEIPA), on cement hydration were comparatively investigated by several techniques including calorimetry, in situ X-ray diffraction analysis and pore solution analysis. Results show that the cement hydration regime is greatly altered by the alkanolamines, depending on their types and dosages. At the dosage of 0.5%, the aluminate reactions, including the formation of AFt and the reaction of C4AF, are greatly accelerated, and consequently the silicate hydration is retarded. Compared to DEIPA, TEA increases the [Al] in pore solution, probably due to the stronger complexation with aluminate ions (Al(OH)4-), while DEIPA notably enhances the dissolution of C4AF after depletion of gypsum, suggesting a stronger complexation with iron ions (Fe3+). Through a comparison of the hydration of pure alite and cement systems, it is found that the effects of the two alkanolamines on cement hydration are primarily influenced by their impacts on the aluminate reaction. },
author = {Lu, Zichen and Kong, Xiangming and Jansen, Daniel and Zhang, Chaoyang},
doi = {10.1680/jadcr.20.00063},
faupublication = {yes},
journal = {Advances in Cement Research},
keywords = {admixtures; aluminates; calorimetry},
note = {CRIS-Team Scopus Importer:2021-11-26},
peerreviewed = {Yes},
title = {{A} comparative study of the effects of two alkanolamines on cement hydration},
year = {2021}
}
@article{faucris.201209003,
author = {Naber, Christoph and Sowoidnich, T. and Bellmann, F. and Neubauer, Jürgen and DeRocher, K. A. and Joester, D.},
doi = {10.1016/j.micron.2018.06.001},
faupublication = {yes},
journal = {Micron},
keywords = {Atom probe tomography; Ca3SiO5; Calcium-Silicate-Hydrate (C-S-H); Focused ion beam},
peerreviewed = {Yes},
title = {{A} contribution to the characterization of the silicate-water interface – {Part} {II}: {Atom} {Probe} {Tomography} of tricalcium silicate},
year = {2018}
}
@article{faucris.201208691,
author = {Sowoidnich, T. and Gordon, L. and Naber, Christoph and Bellmann, F. and Neubauer, Jürgen and Joester, D.},
doi = {10.1016/j.micron.2018.06.004},
faupublication = {yes},
journal = {Micron},
keywords = {Atom probe tomography; Cement; Hydration; Tricalcium Silicate},
pages = {63-68},
peerreviewed = {Yes},
title = {{A} contribution to the characterization of the silicate-water interface – {Part} {I}: {Implication} of a new polished sample hydration technique},
volume = {112},
year = {2018}
}
@article{faucris.216195078,
abstract = {Changes of structural properties of tobermorite in autoclaved aerated concrete (AAC) for various compositions
were characterized and the disadvantages of SEM analysis in this context are discussed. The
influence of variations in the chemical composition of raw materials on lattice parameters, morphology
and domain sizes of tobermorite was investigated by XRD and for comparison by SEM analysis.
Particularly the effect of substitution by Al3+ and (SO4)2− in tobermorite structure was examined. The
dimensions of coherently scattering domains were calculated based on the refinement of anisotropic
peak broadening of tobermorite in XRD diffractograms using a Rietveld compatible approach. No
effect of (SO4)2− on the domain sizes and lattice parameters of tobermorite could be observed.
The amount of anhydrite detected by quantitative XRD analysis indicates that all of the available
(SO4)2− is present as anhydrite. Lath-like shapes of domains and a larger c parameter are calculated
whenever Al3+ is incorporated in a considerable amount. Formation of katoite can be observed very
clearly in SEMmicrographs whenever the amount of available Al3+ exceeds a distinct value in the dry
mix. The effect of Al3+ and (SO4)2− on tobermorite morphology could not be observed clearly by
SEM analysis in AAC samples.
2Al2O3MgOCaCl2. Solid solution was observed. The formula should be written as Ca10Mg1-x/2□x/2[(SiO4)3+x(AlO4)1-x/O2Cl] with 0.352 (chloride not combined with alinite) which is present after synthesis influences the hydration. Calorimetric and SEM investigations lead to the following equation: alinite + H2O → C3A·CaY2·10H2O + Ca(OH)2 + CSH(Cl?)-gel ⇒ Y = Cl-, OH-, 1 2 CO3 2-. © 1994.},
author = {Neubauer, Jürgen and Pöllmann, Herbert},
doi = {10.1016/0008-8846(94)90154-6},
faupublication = {yes},
journal = {Cement and Concrete Research},
month = {Jan},
note = {UnivIS-Import:2015-03-05:Pub.1994.nat.dgeo.IGM.LM.alinit},
pages = {1413-1422},
peerreviewed = {Yes},
title = {{Alinite} - {Chemical} composition, solid solution and hydration behavior},
volume = {24},
year = {1994}
}
@article{faucris.208302654,
abstract = {An extensive dataset suitable for kinetic calculations was collected for the hydration of monoclinic alite at water to solid ratios of 10 and 0.5. The measurement methods used to investigate the hydration behavior are XRD, TGA, solid state NMR, BET, SEM and ICP-OES. A comparison of the two water to solid ratios shows only minor effects of the w/s-ratio on the reaction kinetics. Reaction rates for the two kinetic steps alite dissolution and C-S-H precipitation are calculated from this dataset and compared to the measured reaction rates. Computed reaction rates from C-S-H precipitation show a good match with the measured reaction rates, indicating that the computation incorporates all relevant factors related to C-S-H precipitation kinetics during hydration.
3A and the final formation of ettringite. Moreover, the investigation showed that the dissolution process of C3A is directly controlled by the availability of the calcium sulfate phases. © 2010 Elsevier Ltd.},
author = {Hesse, Christoph and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2010.09.014},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calorimetry A; Hydration A; Kinetics A; Thermodynamic Calculations B; X-Ray Diffraction B},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.anewap},
pages = {123-128},
peerreviewed = {Yes},
title = {{A} new approach in quantitative in-situ {XRD} of cement pastes: {Correlation} of heat flow curves with early hydration reactions},
volume = {41},
year = {2011}
}
@article{faucris.115240664,
author = {Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1993.nat.dgeo.IGM.LM.anwend},
pages = {43},
peerreviewed = {Yes},
title = {{Anwendung} des {Konzeptes} der {Inneren} {Barriere}" auf industrielle {Reststoffe}},
year = {1993}
}
@article{faucris.230911735,
abstract = {Thermodynamic modeling was used to predict the stable hydrate phase assemblages in a ternary CSA-OPC-anhydrite system. On the basis of this modeling, five systems with diverging expected hydrate phases were chosen for experimental examination via QXRD and TGA. The aim of this study was to examine whether and to which extent the predicted equilibrium states are reached after 28 days of hydration. Qualitatively the predicted hydrate phase assemblages were reached for all five systems after 28 d of hydration. When the reaction degrees of the anhydrous phases are taken into account the experimental data fits remarkably well to the thermodynamic model. Additionally, C2S dissolution was found to be the most rapid in straetlingite forming environments.},
author = {Wolf, Julian and Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2019.105956},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Hydration products (B); Kinetics (A); Portland cement (D); Sulfoaluminate (D); Thermodynamic calculations (B)},
note = {CRIS-Team Scopus Importer:2019-12-31},
peerreviewed = {Yes},
title = {{Application} of thermodynamic modeling to predict the stable hydrate phase assemblages in ternary {CSA}-{OPC}-anhydrite systems and quantitative verification by {QXRD}},
volume = {128},
year = {2020}
}
@article{faucris.117071724,
abstract = {The two-dimensional XRD (GADDS) was used to characterize the microstructure of an applied self-leveling compound (SLC). A calcium aluminate cement based SLC was prepared on two different substrates (water absorbent and nonwater absorbent) to determine the vertical distribution of the crystalline phases. The application of the GADDS enables the detection of the phase composition of the hydrating mortar in horizontal slices. Thus the analysis could be carried out in position-sensitive mode at three different areas: near the bottom, in the center, and at the top of the mortar. For investigation of SLCs from the very early hydration stage up to 10 h of hydration, a custom-made in situ sample holder for the measurements was designed and constructed. The combination of the GADDS and the custom-made in situ sample holder provides the possibility to characterize additionally the time-dependent phase composition within the SLC. The nonabsorbent substrate has no effect on the hydration of the binder phases but the absorbent substrate influences the formation of ettringite. In the top layer of the SLC the ettringite content is reduced during the first hours of hydration. The absorbing forces of the substrate lead to migration of the mix water to the substrate. This lack of water results in the reduced formation of ettringite. © 2009 International Centre for Diffraction Dat},
author = {Seifert, Severin and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Motzet, Hubert},
doi = {10.1154/1.3132642},
faupublication = {yes},
journal = {Powder Diffraction},
keywords = {Cement hydration; Ettringite; GADDS; In situ XRD; Position-sensitive resolution; Self-leveling compound; Two-dimensional XRD},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.applic{\_}9},
pages = {107-111},
peerreviewed = {Yes},
title = {{Application} of two-dimensional {XRD} for the characterization of the microstructure of self-leveling compounds},
volume = {24},
year = {2009}
}
@article{faucris.319728346,
abstract = {To accurately simulate the hydration process of cementitious materials, understanding the growth rate of C-S-H layers around clinker grains is crucial. Nonetheless, the thickness of the hydrate layer shows substantial variation around individual grains, depending on their surrounding. Consequently, it is not feasible to measure hydrate layers manually in a reliable and reproducible manner. To address this challenge, a software has been developed to statistically determine the C-S-H thickness, requiring minimal manual interventions for thresholding and for setting limits like particle size or circularity. This study presents a tool, which automatically identifies suitable clinker grains and and perform statistical measurements of their hydrate layer up to a specimen age of 28 days. The findings reveal a significant increase in the C-S-H layer, starting from 0.45 (Formula presented.) after 1 day and reaching 3.04 (Formula presented.) after 28 days. However, for older specimens, the measurement of the C-S-H layer was not feasible due to limited pore space and clinker grains.},
author = {Kleiner, Florian and Becker, Franz and Rößler, Christiane and Ludwig, Horst Michael},
doi = {10.1111/jmi.13283},
faupublication = {yes},
journal = {Journal of Microscopy},
keywords = {calcium silicate hydrate; hydrate layer; hydration},
note = {CRIS-Team Scopus Importer:2024-03-15},
peerreviewed = {Yes},
title = {{A} {Python} tool to determine the thickness of the hydrate layer around clinker grains using {SEM}-{BSE} images},
year = {2024}
}
@article{faucris.310779782,
abstract = {Mimicking the native properties and architecture of natural bone is a remaining challenge within the field of regenerative medicine. Due to the chemical similarity of calcium phosphate cements (CPCs) to bone mineral, these cements are well studied as potential bone replacement material. Nevertheless, the processing and handling of CPCs into prefabricated pastes with adequate properties for 3D printing has drawbacks due to slow reaction times, limited design freedom, as well as fabrication issues such as filter pressing during ejection through thin nozzles. Herein, an aqueous cement paste containing α-tricalcium phosphate powder is proposed, which is stabilized by sodium pyrophosphate (Na4P2O7·10H2O) as additive. Since high powder loadings within pastes can result in filter pressing during extrusion, various concentrations and molecular weights of hyaluronic acid (HyAc) are added to the cement paste, resulting in reduced filter pressing during 3D extrusion-based printing. These cement pastes are investigated regarding their setting reaction after activation with orthophosphate solution by isothermal calorimetry and X-ray diffraction, as well as their hardening performance using Imeter measurements, while the processability is assessed by extrusion through 1.2 and 0.8 mm cannulas. The 3D-printed structures with appropriate HyAc molecular weight and concentration demonstrate suitable mechanical properties and resolution for clinical application.},
author = {Weichhold, Jan and Pfeiffle, Maximilian and Kade, Juliane C. and Hurle, Katrin and Gbureck, Uwe},
doi = {10.1002/adem.202300789},
faupublication = {yes},
journal = {Advanced Engineering Materials},
keywords = {3D printing; calcium phosphate cements; hyaluronic acid; premixed cement pastes},
note = {CRIS-Team Scopus Importer:2023-09-22},
peerreviewed = {Yes},
title = {{Aqueous} {Calcium} {Phosphate} {Cement} {Inks} for {3D} {Printing}},
year = {2023}
}
@article{faucris.117384564,
abstract = {A promising external standard method, first described by O'Connor [15], was used to determine the quantitative phase composition of a hydrating cement paste. On the basis of the data produced we can conclude that the method used is absolutely to be recommended for the examination of OPC pastes, since it displays many advantages in comparison to internal standard methods and other methods. No reaction of the phase alite could be detected during the initial and the induction periods of the cement hydration. Additionally it was found that the cement phases involved in the aluminate reaction (bassanite, gypsum, anhydrite and C3A) react successively. The changes detected in the phase composition of the OPC paste could be assigned to the different periods of OPC hydration. © 2011 Elsevier Ltd. All rights reserved.},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Stabler, Christopher and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2011.03.004},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Amorphous material (B); Cement paste (C); Hydration (A); Kinetics (A); X-ray diffraction (B)},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.aremas{\_}7},
pages = {602-608},
peerreviewed = {Yes},
title = {{A} remastered external standard method applied to the quantification of early {OPC} hydration},
year = {2011}
}
@article{faucris.115342744,
author = {Motzet, Hubert and Pöllmann, Herbert and Neubauer, Jürgen},
faupublication = {yes},
journal = {Cement and Concrete Research},
note = {UnivIS-Import:2015-03-05:Pub.1995.nat.dgeo.IGM.LM.areply},
pages = {1808-1810},
peerreviewed = {Yes},
title = {{A} {Reply} to the {Discussion} of {John} {Bensted} of the {Paper}: {Alinite} - {Chemical} composition, solid solution and hydration behavior},
volume = {25},
year = {1995}
}
@article{faucris.108522744,
abstract = {The ferroelectric solid solution (1 - x)Na0.5Bi0.5TiO3-BaTiO3 (NBT-xBT) is a promising material to substitute for the environmentally undesired Pb-based ferroelectrics. The strong enhancement of the dielectric permittivity and piezoelectric coefficients near the morphotropic phase boundary (MPB) in ferroelectric ABO(3)-type solid solutions is commonly related to the existence of a single or several long-range-ordered phases resulting in a complex nanodomain pattern. Here, NBT-xBT is studied by Raman scattering and complementary synchrotron x-ray total elastic scattering to follow the temperature evolution of the mesoscopic-scale structural transformations for x below, at, and slightly above x(MPB). The most remarkable result is that at x similar to x(MPB) the phonon mode involving vibrations of both off-centered A-site Bi and B-site Ti experiences strong softening and damping near the triple-point temperature in the phase diagram, in strong contrast to the compounds with x < x(MPB) or x > x(MPB). The chemically enhanced coupling between the Bi and Ti subsystems at x(MPB) is facilitated by the subtle disturbance of the coupling processes within the Bi subsystem induced by Ba at x(MPB). These mesoscopic-scale structural and dynamic phenomena seem to be significant for the enhanced response functions at the MPB in NBT-xBT.},
author = {Datta, Kaustuv and Richter, Andreas and Göbbels, Matthias and Neder, Reinhard and Mihailova, B.},
doi = {10.1103/PhysRevB.90.064112},
faupublication = {yes},
journal = {Physical Review B},
peerreviewed = {Yes},
title = {{Atomistic} origin of huge response functions at the morphotropic phase boundary of (1-x){Na0}.{5Bi0}.{5TiO3}-{xBaTiO}(3)},
volume = {90},
year = {2014}
}
@incollection{faucris.107626904,
abstract = {
Das handwerkliche Vorgehen zum Schlagen antiker Münzen war wesentlich vielschichtiger und zeitraubender als bislang angenommen und setzte ein hohes Maß an Erfahrung, Wissen und Können geübter antiker Metallhandwerker voraus. So sind zwei verschiedene Verfahren schon bei der Herstellung der Schrötlinge feststellbar. Zum Prägen waren ebenfalls mindestens zwei weitere verschiedene Vorgehensweisen bekannt, die in unterschiedlichem Maß auch den Einsatz von mechanischen Vorrichtungen erfordert haben. Der Einsatz eines smartSCAN-3D System der Breuckmann GmbH erlaubt es allansichtige 3D-Modelle dieser Münzen zu erstellen, die mit den 2D-Bildserien einer Elektronenstrahlmikrosonde (EPMA ElectronProbeMicroAnalysis) verbunden werden können und so die einzelnen Spuren des handwerklichen Vorgangs, aber auch die Eigenarten des verwendeten Metalles deutlich sichtbar werden lassen.
The manufacturing process in minting ancient coins during greek and roman antiquity appears to be a complex and time-consuming procedure, affording tknowledge and skill of experienced craftsmen in metalworking. There are two different methods in producing the raw metal plate to be embossed and at least two more in the minting process itself, to some degree demanding the use of some sort of mechanical aid or machinery. Examing the ancient coins with a smartSCAN-3D System of Breuckmann GmbH as well as under a EPMA ElectronProbeMicroAnalysis and combining both the 3D model and the 2D pictures gives not only clear and detailled images of the various traces, caused by the embossment itself, but also of the peculiarities of the metal used for coinage.
},
author = {Boß, Martin and Breuckmann, Bernhard and Göbbels, Matthias},
booktitle = {Konferenzband EVA 2012 Berlin Elektronische Medien & Kunst, Kultur, Historie, 7. – 9. November 2012, 19. Berliner Veranstaltung der internationalen EVA-Serie Electronic Imaging & the Visual Arts},
faupublication = {yes},
pages = {73-78},
peerreviewed = {Yes},
title = {{Auf} der {Spurensuche} des {Handwerks} zum {Prägen} antiker {Münzen} unter {Einsatz} von höchstaufgelösten digitalen {2D}- und {3D}-{Modellen}},
year = {2012}
}
@inproceedings{faucris.115932124,
author = {Göbbels, Matthias and Dauscher, Melanie and Jüstel, Thomas},
booktitle = {E-MRS Spring Meeting 2002},
date = {2002-06-18/2002-06-21},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2002.nat.dgeo.IGM.LM.babeta},
pages = {L 5},
peerreviewed = {unknown},
title = {{Ba}-beta-alumina phosphors: chrystal chemistry and stability},
venue = {Strasbourg},
year = {2002}
}
@inproceedings{faucris.121879824,
author = {Göbbels, Matthias},
booktitle = {Mineralogy for the New Millennium},
date = {2002-06-06/2002-06-06},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2002.nat.dgeo.IGM.LM.betaal},
pages = {288},
peerreviewed = {unknown},
title = {{Beta}-alumina and magnetoplumbite-type compounds in the systems {CaO}/{SrO}/{BaO}-{Al2O3}/{Fe2O3}-{MgO}},
venue = {Edinburgh},
year = {2002}
}
@article{faucris.112006444,
abstract = {A phosphor based on Sr0.97Al2O4:Eu 0.03 with a biomorphous morphology is manufactured via vacuum assisted infiltration of wood tissue [Pinus sylvestris) with a precursor nitrate solution. The nitrate solution penetrates homogeneously into the uniform arrangement of rectangular shaped tracheidal cells of the wood tissue. According to scanning electron microscopy, the original wood cell walls are completely transformed retaining the original wood structure. The major crystalline phase is monoclinic SrAl2O4, detected by X-ray diffraction and confirmed by Rietveld refinement. Energy-dispersive X-ray analysis proves the homogeneous conversion of the original wood cell wall into Sr 0.97Al2O4:Eu0.03 struts. The optical properties of the resulting phosphor material are determined by photoluminescence and cathode-luminescence spectroscopy in scanning electron microscopy. The biotemplated Sr0.97Al2O 4IEU0.03 shows a characteristic green emission at 530 nm (2.34 eV). Shaping biomorphous SrAl2O4:Eu2+ phosphor with a microstructure pseudomorphous to the bioorganic template anatomy offers a novel approach for designing micropatterned phosphor materials. © 2009 WILEY-VCH Verlag GmbH & Co. KCa},
author = {Kostova, Marya H. and Zollfrank, Cordt and Batentschuk, Miroslaw and Götz-Neunhoeffer, Friedlinde and Winnacker, Albrecht and Greil, Peter},
doi = {10.1002/adfm.200800878},
faupublication = {yes},
journal = {Advanced Functional Materials},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.bioins},
pages = {599-603},
peerreviewed = {Yes},
title = {{Bioinspired} {Design} of {SrAl2O4}:{Eu2}+ {Phosphor}},
volume = {19},
year = {2009}
}
@article{faucris.112208624,
abstract = {The design of hierarchically patterned novel structures by replicating the cellular tissue of wood has recently attained increasing interest. X-ray storage phosphor BaFBr:Eu2+ is manufactured via vacuum assisted repeated infiltration of wood tissue (Pinus sylvestris). A submicrometer precipitate is formed via wet chemical reaction of NH4F, BaBr2·2H2O and EuCl3·6H2O in methanol. According to scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX), the original wood cell walls are filled with the precipitate and completely transformed into BaFBr struts after sintering at 800 °C. The optical properties of the biomorphous phosphor microstructure are determined by photoluminescence spectroscopy (PL) at room temperature, photo-stimulated luminescence spectroscopy (PSL) and cathodoluminescence spectroscopy (CL) in the SEM. A broadening of the PSL peak is observed and ascribed to the incorporation of calcium impurities present in the pine wood tissue. The potential of biotemplates for generating highly oriented and optically isolated μm- and sub-μm matrix of X-ray storage phosphor material is illustrated.
},
author = {Kostova, Marya H. and Batentschuk, Miroslaw and Götz-Neunhoeffer, Friedlinde and Gruber, Sabine and Winnacker, Albrecht and Greil, Peter and Zollfrank, Cordt},
doi = {10.1016/j.matchemphys.2010.03.077},
faupublication = {yes},
journal = {Materials Chemistry and Physics},
keywords = {Optical properties; Biotemplating; X-ray storage phosphor},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.biotem},
pages = {166-171},
peerreviewed = {Yes},
title = {{Biotemplating} of {BaFBr}:{Eu2}+ for {X}-ray storage phosphor applications},
volume = {123},
year = {2010}
}
@article{faucris.247501417,
abstract = {Brackish-water carbonates are far less studied than their marine or limnic counterparts. However, their association with few, specialized species enables the documentation of fine-scale changes in the depositional environment. The Cenozoic Mainz Basin (Germany) was only sporadically connected to the North Sea and the Paratethys, exposing several transitions from marine to fresh water influence. Focusing on one outcrop of the Rüssingen Formation of Mainz-Weisenau (Aquitanian, Miocene), we present a detailed analysis of the faunal and sedimentological responses to changing salinities and water depth, including algal reef growth and facies development. The deposits include allochthonous limestones surrounding an autochthonous reef complex and several smaller reef patches. The allochthonous facies is dominated by the gastropod Hydrobia inflata, and the reef facies is mainly made up by the green alga Cladophorites sp. The algal thalli are overgrown by cryptocrystalline, organic precipitations, and laminated, chemical precipitations. Locally, quiver-shaped structures of Trichoptera sp. protective cases occur. The depositional setting was a shallow, low energy, and brackish environment supersaturated by carbonate. We could not confirm a general trend of reducing salinities as reported for the Rüssingen Formation. Our results question previously reported episodic desiccation events, because apparent caliche horizons actually represent thin beds of increased Cladophorites growth. Set-up, distribution of the reef facies, and reef debris indicate short-time variations of temperature, salinity and water depth. We conclude that these variations are based on the geographic position at the edge of an algal reef barrier, separating the Mainz Basin from the Rhine Rift Valley.
2AHx (2CaO·Al2O3·xH2O), for which three different basal spacings are detected during early hydration at ambient temperatures. By combining Rietveld refinement and the G-factor method, C2AH7.5 was calibrated using a variety of syntheses and preparations for XRD. Since cell volume and X-ray density (that are necessary for the G-factor method) of C2AH7.5 are not known, an approach similar to [1,2] was used for the generation of a hkl-phase model: A “F-factor” – a factor that replaces the product of these two unknowns, which was verified by the multitude of syntheses – was successfully determined within this paper. The model was applied for the absolute quantification of C2AHx during in-situ XRD of CA (CaO·Al2O3) hydration at 40 °C. The results demonstrate the potential of the hkl-phase model in practical use and reveal the accuracy of the determined F-factor.},
author = {Goergens, Julian and Köhler, Andreas and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2022.106854},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium aluminate cement (D); Crystal structure (B); Hydration (A); Hydration products (B); X-ray diffraction (B)},
note = {CRIS-Team Scopus Importer:2022-06-10},
peerreviewed = {Yes},
title = {{Calibration} and quantitative analysis of {C2AHx} ({2CaO}·{Al2O3}·{xH2O}) by {Rietveld} refinement combined {G}-factor method},
volume = {158},
year = {2022}
}
@article{faucris.106952604,
abstract = {One alpha-tricalcium phosphate (alpha-TCP) powder was either calcined at 500 degrees C to obtain fully crystalline alpha-TCP or milled for different durations to obtain alpha-TCP powders containing various amounts of X-ray amorphous tricalcium phosphate (ATCP). These powders containing between 0 and 71 wt.% ATCP and up to 2.0 +/- 0.1 wt.% beta-TCP as minor phase were then hydrated in 0.1 M Na2HPO4 aqueous solution and the resulting heat flows were measured by isothermal calorimetry. Additionally, the evolution of the phase composition during hydration was determined by in situ XRD combined with the G-factor method, an external standard method which facilitates the indirect quantification of amorphous phases. Maximum ATCP hydration was reached after about 1 h, while that of crystalline alpha-TCP hydration occurred between 4 and 11 h, depending on the ATCP content. An enthalpy of formation of -4065 6 kJ/mol (T = 23 degrees C) was calculated for ATCP (Ca-3(PO4)(2)), while for crystalline alpha-TCP (alpha-Ca-3(PO4)(2)) a value of -4113 +/- 6 kJ/mol (T= 23 degrees C) was determined. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
author = {Hurle, Katrin and Neubauer, Jürgen and Bohner, Marc and Doebelin, Nicola and Götz-Neunhoeffer, Friedlinde and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.actbio.2015.05.026},
faupublication = {yes},
journal = {Acta Biomaterialia},
keywords = {Calcium phosphate cement; CDHA; Amorphization; Heat flow calculation; Isothermal calorimetry},
note = {UnivIS-Import:2015-07-08:Pub.2015.nat.dgeo.IGM.LM.calori},
peerreviewed = {Yes},
title = {{Calorimetry} investigations of milled alpha-tricalcium phosphate (alpha-{TCP}) powders to determine the formation enthalpies of alpha-{TCP} and {X}-ray amorphous tricalcium phosphate},
volume = {2015},
year = {2015}
}
@article{faucris.117335504,
abstract = {Synthetic rubies were grown by the optical floating zone method and characterized by cathodolumi-nescence (CL) microscopy and spectroscopy in combination with microprobe analysis. The measured intensity of the Cr 3+-induced CL of corundum is influenced by different parameters such as the sample thickness and orientation, the intensity of the beam current, and the quality of the sample surface. Furthermore, the spectral distribution of the CL emission changes with different concentrations of Cr in the corundum structure. Due to these effects, it is usually not possible to estimate the Cr content directly by using the measured CL intensity. However, we have developed an indirect method that is not significantly affected by these parameters. By using intensity ratios instead of measured intensities, a level of quantification of Cr in natural and synthetic corundum is now possible. Our study shows that the intensity ratio between the N-line at 701.6 nm and the sideband maximum at 713.2 nm displays a nearly linear dependence on the Cr concentration from ca. 100-300 ppm up to ca. 1.1 mol% Cr2O 3. These results give a possible approach to develop an optical-microscope-based CL spectroscopy for quantitative measurements of Cr in natural rubies and synthetic α-Al2O3 materials.},
author = {Guguschev, Christo and Goetze, Jens and Göbbels, Matthias},
doi = {10.2138/am.2010.3291},
faupublication = {yes},
journal = {American Mineralogist},
keywords = {α-Al; CL; Crystal growth; Floating zone technique; Quantitative cathodoluminescence; Rubies},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.cathod},
pages = {449-455},
peerreviewed = {Yes},
title = {{Cathodoluminescence} microscopy and spectroscopy of synthetic ruby crystals grown by the optical floating zone technique},
volume = {95},
year = {2010}
}
@article{faucris.112633664,
abstract = {The hydration process of a commercial Portland cement was followed by means of heat flow calorimetry. The measured heat flow was compared with calculated heat flow curves based on XRD data. Examined in particular was the influence of one selected superplasticizer on the hydration of the Portland cement. It was shown that the superplasticizer in question retards both the aluminate reaction and the silicate reaction. It is certainly conceivable that there are more than only one explanation for the interaction between the superplasticizer and the cement. A complexation of Ca 2 + ions from pore solution by the superplasticizer is as thinkable as the adsorption of the polymer on the nuclei or the anhydrous grain surfaces which in turn might lead to the prevention of the growth of the nuclei or the dissolution of the anhydrous grains. © 2011 Elsevier Ltd. All rights reserved.},
author = {Jansen, Daniel and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Härzschel, Reinhard and Hergeth, Wolf Dieter},
doi = {10.1016/j.cemconres.2011.10.005},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Hydration; OPC; Superplasticizer; X-ray diffraction},
note = {UnivIS-Import:2015-03-09:Pub.2012.nat.dgeo.IGM.LM.change},
pages = {327-332},
peerreviewed = {Yes},
title = {{Change} in reaction kinetics of a {Portland} {Cement} caused by a superplasticizer {Calculation} of heat flow curves from {XRD} data},
year = {2012}
}
@article{faucris.228833454,
abstract = {A thorough characterization of starting materials is the precondition for further research, especially for cement, which contains various phases and presents quite a complex material for fundamental scientific investigation. In the paper at hand, the characterization data of the reference cement CEM I 42.5 R used within the priority program 2005 of the German Research Foundation (DFG SPP 2005) are presented from the aspects of chemical and mineralogical compositions as well as physical and chemical properties. The data were collected based on tests conducted by nine research groups involved in this cooperative program. For all data received, the mean values and the corresponding errors were calculated. The results shall be used for the ongoing research within the priority program.},
author = {Lu, Z. C. and Haist, M. and Ivanov, D. and Jakob, Cordula and Jansen, Daniel and Leinitz, S. and Link, J. and Mechtcherine, V. and Neubauer, Jürgen and Plank, J. and Schmidt, W. and Schilde, C. and Schröfl, C. and Sowoidnich, T. and Stephan, D.},
doi = {10.1016/j.dib.2019.104699},
faupublication = {yes},
journal = {Data in Brief},
keywords = {Characterization; DFG SPP 2005; Portland cement},
note = {CRIS-Team Scopus Importer:2019-11-08},
peerreviewed = {Yes},
title = {{Characterization} data of reference cement {CEM} {I} 42.5 {R} used for priority program {DFG} {SPP} 2005 “{Opus} {Fluidum} {Futurum} – {Rheology} of reactive, multiscale, multiphase construction materials”},
volume = {27},
year = {2019}
}
@article{faucris.287725291,
author = {Lu, Z. C. and Haist, Michael and Ivanov, Dimitri and Jakob, Cordula and Jansen, D. and Schmid, Marlene and Kissling, P. A. and Leinitz, S. and Link, J. and Mechtcherine, Viktor and Neubauer, Jürgen and Plank, J. and Schmidt, W. and Schilde, C. and Schroefl, C. and Sowoidnich, T. and Stephan, D.},
doi = {10.1016/j.dib.2020.105524},
faupublication = {yes},
journal = {Data in Brief},
keywords = {Slag; DFG SPP 2005; Cement; Characterization},
peerreviewed = {Yes},
title = {{Characterization} data of reference cement {CEM} {III}/{A} 42.{5N} used for priority program {DFG} {SPP} 2005 “{Opus} {Fluidum} {Futurum} – {Rheology} of reactive, multiscale, multiphase construction materials”},
volume = {30},
year = {2020}
}
@article{faucris.288603749,
abstract = {A thorough characterization of base materials is the prerequisite for further research. In this paper, the characterization data of the reference materials (CEM I 42.5 R, limestone powder, calcined clay and a mixture of these three components) used in the second funding phase of the priority program 2005 of the German Research Foundation (DFG SPP 2005) are presented under the aspects of chemical and mineralogical composition as well as physical and chemical properties. The data were collected based on tests performed by up to eleven research groups involved in this cooperative program.
1H-TD-NMR. This allows a good overview about mineralogical changes during hydration and conclusions about their effect on rheological and microstructural changes within the paste. The reaction kinetic are controlled either by varying curing temperature or by an organic additive, which allows adjustment of the initial aluminate reaction while delaying the silicate reaction for hours. A significant correlation of ettringite content and rheological behavior due to structural build-up of the paste is observed in all investigated systems. The potential influence of ettringite content on structural build-up of the paste is found to be comparable to the effect of solid volume fraction on rheology (viscosity & yield stress).},
author = {Jakob, Cordula and Jansen, Daniel and Dengler, Joachim and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2023.107095},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ettringite; Hydration kinetics; OPC; Organic additive; Rheology},
note = {CRIS-Team Scopus Importer:2023-01-27},
pages = {107095},
peerreviewed = {Yes},
title = {{Controlling} ettringite precipitation and rheological behavior in ordinary {Portland} cement paste by hydration control agent, temperature and mixing},
volume = {166},
year = {2023}
}
@article{faucris.266478903,
abstract = {Correlation between adsorption behavior of colloidal polymers on cement grains and yield stress of fresh cement pastes (fcps) is studied using four polymer latexes with varied surface charge density and glass transition temperature (Tg). Adsorption isotherm of the polymers is divided into two stages: before and after adsorption plateau. Higher charge density and lower Tg are beneficial to adsorption of polymer on cement grains. Before adsorption plateau, the adsorbed polymer particles play a bridging effect among cement grains which firstly increases and then decreases with increasing surface coverage ratio. Maximum bridging effect occurs at surface coverage ratio of ca. 20%. After adsorption plateau, yield stress of the fcps is significantly lower than that of the blank fcp because the adsorbed polymer layer reduces interaction force between cement grains, by increasing the minimum distance between two cement grains and generating repulsive force due to negative charges of the polymer particles.},
author = {Zhang, Chaoyang and Kong, Xiangming and Yu, Jianwei and Jansen, Daniel and Pakusch, Joachim and Wang, Shengxian},
doi = {10.1016/j.cemconres.2021.106668},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Adsorption behavior; Colloidal polymers; Fresh cement paste; Yield stress},
note = {CRIS-Team Scopus Importer:2021-11-26},
peerreviewed = {Yes},
title = {{Correlation} between the adsorption behavior of colloidal polymer particles and the yield stress of fresh cement pastes},
volume = {152},
year = {2022}
}
@article{faucris.112431264,
author = {Kannan, Sanjeevi and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and da Fonte Ferreira, José Maria},
faupublication = {yes},
journal = {Journal of the American Ceramic Society},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.cosubs},
pages = {230-235},
peerreviewed = {Yes},
title = {{Cosubstitution} of {Zinc} and {Strontium} in ß-{Tricalcium} {Phosphate}: {Synthesis} an {Characterization}},
volume = {I},
year = {2011}
}
@article{faucris.234234537,
abstract = {Processing-induced alignment of Li2Si2O5 crystals in biomedical lithium disilicate glass-ceramics have been shown to increase the monotonic resistance to fracture and better simulate the mechanical behavior of natural dental tissues. The (mis)orientation of the [001] direction in the Li2Si2O5 crystal phase relative to the crack growth plane was induced by injection-molding of a high aspect ratio composition in order to determine the effect of crystal alignment. The role of particulate geometry was assessed by comparing two compositions having randomly oriented Li2Si2O5 crystals of similar phase fraction but dissimilar crystal aspect ratios. Static and cyclic fatigue experiments in varying frequencies and R-ratios were conducted to clarify the degradation of crack bridging mechanisms induced by the crystal phase during repetitive opening and closure of the crack faces. Both crystal alignment and aspect ratio showed to play important roles in affecting the subcritical crack growth resistance the lifetime of lithium disilicate biomedical components.},
author = {Kirsten, Julia and Belli, Renan and Wendler, Michael and Petschelt, Anselm and Hurle, Katrin and Lohbauer, Ulrich},
doi = {10.1016/j.jnoncrysol.2019.119877},
faupublication = {yes},
journal = {Journal of Non-Crystalline Solids},
keywords = {Anisotropy; Crystal alignment; Cyclic fatigue; Lithium disilicate; Static fatigue},
note = {CRIS-Team Scopus Importer:2020-02-14},
peerreviewed = {Yes},
title = {{Crack} growth rates in lithium disilicates with bulk (mis)alignment of the {Li2Si2O5} phase in the [001] direction},
volume = {532},
year = {2020}
}
@article{faucris.218983823,
abstract = {Objective: The study is aimed to evaluate the two single commercially available two-step lithium-(di)silicate systems by analyzing their parent glass composition and studying the quantitative crystalline and glass phase evolution during the second stage heat-treatment. The mechanical repercussions of the crystallization firing were evaluated using strength and fracture toughness tests. Methods: XRF and ICP-OES were used to determine the oxide composition of the parent glasses in Suprinity PC (Vita Zahnfabrik) and IPS e.max CAD (Ivoclar-Vivadent). The crystalline phase of both materials was determined by quantitative XRD and the G-factor method in the partially and post-crystallization states. The oxide composition of the residual glass phase was derived by subtracting the chemistry of the crystalline phase fractions from the parent glass composition. Mechanical testing of biaxial flexural strength and fracture toughness were used to demonstrate how crack-like defects behave during crystallization. Results: The two tested lithium (di)silicate systems showed strong differences in oxide composition of the parent glass. This showed to influence the transformation of lithium metasilicate in lithium disilicate, with the former remaining in high vol.% fraction in the post-crystallization Suprinity PC. In IPS e.max CAD cristobalite precipitated at the surface during the second-heat treatment. Strength and fracture toughness tests revealed that crack in both materials, whether introduced by grinding or indentation, heal during the crystallization firing. Cristobalite seemed to have contributed to a surface strengthening effect in IPS e.max CAD. Significance: Accurate crystalline phase quantification aids in the determination of the residual glass composition in dental glass-ceramics. For both systems crystallization firing induced healing of cracks generated by CAM grinding.},
author = {Belli, Renan and Lohbauer, Ulrich and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin},
doi = {10.1016/j.dental.2019.05.013},
faupublication = {yes},
journal = {Dental Materials},
keywords = {Dental; Fracture toughness; Glass-ceramic; Lithium disilicate; Lithium silicate; X-ray diffraction},
note = {CRIS-Team Scopus Importer:2019-05-28},
peerreviewed = {Yes},
title = {{Crack}-healing during two-stage crystallization of biomedical lithium (di)silicate glass-ceramics},
year = {2019}
}
@inproceedings{faucris.113014264,
author = {Göbbels, Matthias},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LM.crysta},
pages = {61},
peerreviewed = {Yes},
title = {{Crystal} chemistry and crystal structures of complex hexa-aluminates and hexa-ferrites},
year = {2004}
}
@article{faucris.243941678,
abstract = {Multicomponent silicate bioactive glass (BG) (53SiO2‐20CaO‐6Na2O‐4P2O5‐12K2O‐ 5MgO in wt. %) (13–93 composition) was prepared via the sol–gel process. The influence of thermal treatment on the crystallization was evaluated using differential scanning calorimetry (DSC), X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray nano-computed tomography (nano-CT). The temperature and time of the thermal treatment strongly influenced the formation of the crystalline phases. The preliminary outcomes demonstrate the possibility of tailoring the crystallinity of 13–93 BG powder in the range 5–43 wt. % by controlling the temperature and time of the heat treatment. The microstructure of powders sintered at two different temperatures (650 °C and 700 °C from 30 min to 4 h) was evaluated by TEM. X-ray nano-computed tomography (nano-CT) was used to visualize the 3D morphology and distribution of crystallization areas in the samples in powder form. A large range between the glass transformation and the crystallization temperatures is observed, which provides the prospect of a suitable material to manufacture directly 3D structures (e.g. porous scaffolds) without an intermediate processing step.},
author = {Nawaz, Qaisar and de Pablos-Martín, Araceli and Martins de Souza e Silva, Juliana and Berthold, Lutz and Hurle, Katrin and Contreras Jaimes, Altair T. and Sitarz, Maciej and Brauer, Delia S. and Boccaccini, Aldo R.},
doi = {10.1016/j.jeurceramsoc.2020.09.052},
faupublication = {yes},
journal = {Journal of the European Ceramic Society},
keywords = {Bioactive glasses; Crystallization behavior; Rietveld refinement; Sintering of 13-93 bioactive glass; Sol–gel},
note = {CRIS-Team Scopus Importer:2020-10-16},
peerreviewed = {Yes},
title = {{Crystallization} study of sol–gel derived 13-93 bioactive glass powder},
year = {2020}
}
@article{faucris.119580604,
abstract = {A new phase in the system SrO–Al2O3–MgO, which was analyzed by EPMA as Sr2MgAl22O36, was recently found. It is located in the middle of the join connecting strontium hexaaluminate (SrAl12O19) of magnetoplumbite structure and strontium magnesium hexaaluminate (SrMgAl10O17) of β-alumina structure. The crystals were grown by the floating zone method and its crystal structure was analyzed by using the single crystal X-ray was analyzed by using the single crystal X-ray diffraction method. The space group wasPm2 with lattice parametersa= 5.583 Å andc= 22.225 Å. The observedc-axis length is intermediate between those of SrAl12O19(c= 22.00 Å) and SrMgAl10O17(c= 22.399 Å). The structure refinement result has shown that it had the alternate stacking of the conduction layers of magnetoplumbite-type (SrAlO3) and β-alumina-type (SrO) separated by a spinel block ((Al, Mg)11O16). This is the first time that such a “mixed-layer” structure of β-alumina and magnetoplumbite is found to exist in the hexaaluminates containing one species of large cation.},
author = {Iyi, Nobou and Göbbels, Matthias},
faupublication = {no},
journal = {Journal of Solid State Chemistry},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.crysta},
pages = {46-52},
peerreviewed = {Yes},
title = {{Crystal} structure of the new magnetoplumbite related compound in the system {SrO} {Al{\_}2{\_}O{\_}3{\_}}-{MgO}},
volume = {122},
year = {1996}
}
@article{faucris.238603610,
abstract = {A new method for the nuclear magnetic resonance (NMR) surface relaxivity calibration in hydrated cement samples is proposed. This method relies on a combined analysis of 28-d hydrated tricalcium silicate samples by scanning electron microscopy (SEM) image analysis and H-1-time-domain (TD)-NMR relaxometry. Pore surface and volume data for interhydrate pores are obtained from high resolution SEM images on surfaces obtained by argon broad ion beam sectioning. These data are combined with T-2 relaxation times from H-1-TD-NMR to calculate the systems surface relaxivity according to the fast exchange model of relaxation. This new method is compared to an alternative method that employs sequential drying to calibrate the systems surface relaxivity.},
author = {Naber, Christoph and Kleiner, Florian and Becker, Franz and Long Nguyen-Tuan, and Roessler, Christiane and Etzold, Merlin A. and Neubauer, Jürgen},
doi = {10.3390/ma13071779},
faupublication = {yes},
journal = {Materials},
note = {CRIS-Team WoS Importer:2020-05-22},
peerreviewed = {Yes},
title = {{C}-{S}-{H} {Pore} {Size} {Characterization} {Via} a {Combined} {Nuclear} {Magnetic} {Resonance} ({NMR})-{Scanning} {Electron} {Microscopy} ({SEM}) {Surface} {Relaxivity} {Calibration}},
volume = {13},
year = {2020}
}
@article{faucris.234384506,
abstract = {β-tricalcium phosphate (β-TCP) is applied in medicine. As Cu2+ is known to exhibit antimicrobial activity in the body and to improve wound healing and angiogenesis, it is an eligible ion for substitution in β-TCP. Crystalline β-TCP with varying amounts of Cu2+ ranging from 0 to 20 mol% was synthesized at 1000 ± 10 °C and investigated by powder X-ray diffraction followed by Rietveld refinement. The lattice parameters a and c and the unit cell volume of Ca3 - xCux(PO4)2 showed a significant decrease with increasing Cu2+ amount until a content of 15 mol% Cu2+. In all samples with Cu2+ amounts higher than 14 mol% Ca3Cu3(PO4)4 was detected as secondary phase. The refinement of the occupancy factors showed a preferred incorporation of Cu2+ at the Ca(5) site. The limit of Cu2+ incorporation in the structure of β-TCP before forming a secondary phase can be inferred at a Cu2+ content of 15 mol%.},
author = {Späth, Karla and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin},
doi = {10.1016/j.jssc.2020.121225},
faupublication = {yes},
journal = {Journal of Solid State Chemistry},
keywords = {Copper doping; Crystal structure; Substitution limit; Tricalcium phosphate},
note = {CRIS-Team Scopus Importer:2020-02-18},
peerreviewed = {Yes},
title = {{Cu2}+ doped β-tricalcium phosphate: {Solid} solution limit and crystallographic characterization by rietveld refinement},
volume = {285},
year = {2020}
}
@article{faucris.249466517,
author = {Brandt, Sönke and Faßbender, Marc Lorin and Klemd, Reiner and Macauley, Chandra and Felfer, Peter and Haase, Karsten},
doi = {10.1130/G48417.1},
faupublication = {yes},
journal = {Geology},
peerreviewed = {Yes},
title = {{Cumulate} olivine: {A} novel host for heavy rare earth element mineralization},
volume = {49},
year = {2020}
}
@article{faucris.255556849,
abstract = {One key issue influencing a broader application of Bioglass 45S5 in tissue engineering is its inherent crystallization tendency, severely limiting the mechanical strength of 3D porous scaffolds. Despite numerous studies, Bioglass 45S5 crystallization is not yet fully understood with regard to the mechanisms involved or morphology of the crystal phases forming. Here we show how two cutting-edge imaging techniques, state-of-the-art transmission electron microscopy (TEM) with image correction including energy dispersive X-ray spectroscopy and X-ray nano-computed tomography (nano-CT), allowed us to visualize changes in microstructure from near-nucleation to almost full crystallization in bulk Bioglass 45S5. At early times of heat treatment at 660 °C the formation of phase-separated nano-droplets within the glassy matrix was observed. Later, besides surface crystallization, bulk crystallization of combeite spheres was predominant. The formation of the first combeite spheres, their coarsening with time and finally their merging at near full crystallization were recorded by in situ high-temperature optical microscopy videos. The 3D nature of these spheres was confirmed by nano-CT, while TEM showed that their internal structure was composed of sub-micron grains. X-ray diffraction analysis at early time points showed a much higher crystalline fraction in bulk samples compared to powder samples, highlighting the influence of processing and sample morphology. These results show the importance of using complementary techniques for gaining insight into the crystallization process in the volume. In addition, we show that TEM and nano-CT are suitable characterization techniques to visualize the crystallization even in fast crystallizing systems, such as bioactive glasses.},
author = {Contreras Jaimes, Altair T. and de Pablos-Martín, Araceli and Hurle, Katrin and Martins de Souza e Silva, Juliana and Berthold, Lutz and Kittel, Thomas and Boccaccini, Aldo R. and Brauer, Delia S.},
doi = {10.1016/j.jeurceramsoc.2021.02.051},
faupublication = {yes},
journal = {Journal of the European Ceramic Society},
keywords = {Biomaterials; Crystallization; Non-metallic glasses; Transmission electron microscopy; X-ray computed tomography},
note = {CRIS-Team Scopus Importer:2021-04-19},
peerreviewed = {Yes},
title = {{Deepening} our understanding of bioactive glass crystallization using {TEM} and {3D} nano-{CT}},
year = {2021}
}
@article{faucris.209000435,
author = {Will, Thomas M. and Schmädicke, Esther and Frimmel, Hartwig E.},
doi = {10.1007/s00710-010-0125-7},
faupublication = {yes},
journal = {Mineralogy and Petrology},
pages = {185-200},
peerreviewed = {Yes},
title = {{Deep} solid-state equilibration and deep melting of plagioclase-free spinel peridotite from the slow-spreading {Mid}-{Atlantic} {Ridge}, {ODP} {Leg} 153},
volume = {100},
year = {2010}
}
@incollection{faucris.264871822,
abstract = {Sediments of the Aravalli Supergroup have acquired a complex superposed fold pattern during Neoproterozoic amalgamation (Grenvillian Orogeny) of north Indian blocks (Marwar block, Bundelkhand craton, North Delhi crustal block) and collision with the Central Indian Craton. The Upper Aravalli metasediments reveal a prograde mono-metamorphic history with continuous increase in metamorphic conditions towards the Delhi Supergroup contact. The transition from phyllites to garnet-bearing mica schist is accompanied by strain increase seen in tightening of F2 folds. Microstructures and deformationmechanism in quartz document an increasing temperature gradient from similar to 280 to 500 degrees C towards the Aravalli-Delhi contact. Garnets, grown prior to the contact-parallel, pervasive second cleavage indicate crystallisation along a prograde P-T-path from 400 degrees C/4 kbar to 500 degrees C/7 kbar. Older metamorphic records in the northern Aravalli-Delhi mobile belt sector (e.g. Sandmata Complex, Mangalwar Complex, and North Delhi Terrane) cannot be related with deformation and metamorphism in the Aravalli Supergroup. Considering the pattern of bivergent thrusts with the Neoproterozoic active continental margin along the western side of the Delhi Fold Belt, the lack of any magmatic signature and the inferred contractional fold and thrust deformation along the eastern proximity can be interpreted as a retro-wedge setting.},
address = {Cham},
author = {Hahn, Gregor and Kodl, Georg and de Wall, Helga and Schulz, Bernhard and Bestmann, Michel and Chauhan, Narendra Kumar},
booktitle = {Structural Geometry of Mobile Belts of the Indian Subcontinent},
doi = {10.1007/978-3-030-40593-9{\_}2},
editor = {Tapas Kumar Biswal, Sumit Kumar Ray, Bernhard Grasemann},
faupublication = {yes},
isbn = {978-3-030-40593-9},
keywords = {Aravalli-Delhi contact; Aravalli supergroup; Multiple phases of folding; Quartz microstructure; Garnet thermobarometry; NW India},
note = {CRIS-Team WoS Importer:2021-10-08},
pages = {23-55},
peerreviewed = {unknown},
publisher = {Springer},
series = {Society of Earth Scientists Series},
title = {{Deformation} in the {Aravalli} {Supergroup}, {Aravalli}-{Delhi} {Mobile} {Belt}, {NW} {India} and {Tectonic} {Significance}},
year = {2020}
}
@inproceedings{faucris.116267624,
author = {Götz-Neunhoeffer, Friedlinde and Göbbels, Matthias and Enderle, Ralph and Neubauer, Jürgen and Zeschky, Jürgen},
booktitle = {Applied Mineralogy},
faupublication = {yes},
isbn = {85-98656-01-1},
note = {UnivIS-Import:2015-04-16:Pub.2004.nat.dgeo.IGM.LM.degrad},
pages = {179-182},
peerreviewed = {unknown},
title = {{Degradable} bone substituition material based on cellular {Ca}-phosphates},
venue = {Sao Paulo},
year = {2004}
}
@inproceedings{faucris.120136324,
address = {Weimar},
author = {Götz-Neunhoeffer, Friedlinde},
booktitle = {Tagungsbericht: Ibausil, 15. Internationale Baustofftagung, Band 1},
date = {2003-09-24/2003-09-27},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.derein},
pages = {467-478},
peerreviewed = {unknown},
publisher = {Bauhaus-Universität},
title = {{Der} {Einfluss} {Ca}-reicher {Verbindungen} auf das {Hydratationsverhalten} von {Monocalciumaluminat} ({CA})},
venue = {Weimar},
volume = {1},
year = {2003}
}
@article{faucris.259591084,
abstract = {Limestone-marl alternations are commonly used for high-resolution cyclostratigraphic studies and palaeoenvironmental reconstructions, but diagenetic studies indicate that not all limestone-marl alternations reflect genuine differences in the initial sediment composition driven by environmental changes. Differences in the ratios of diagenetically inert trace elements between limestones and marls indicate changes affecting the terrigenous fraction of the precursor sediment. Contrarily, limestone-marl alternations without these differences can be the product of: (i) variations in CaCO3 input (aragonite, calcite); (ii) distortion of the latter by diagenetic CaCO3 redistribution; or (iii) diagenetic CaCO3 redistribution in a homogeneous precursor sediment. The aim of this study is to provide a method to differentiate these cases and to identify variations in the proportion of calcite and aragonite in the precursor sediment composition. The model of differential diagenesis assumes that the concentration of diagenetically inert elements is inversely proportional to the amount of redistributed CaCO3. Consequently, the difference between ratios of diagenetically inert elements from two adjacent beds is a measure for CaCO3 redistribution. This is quantifiable by the vector length between ratios from two adjacent beds. The approach is illustrated here by evaluation of a case study from the Silurian of Gotland, Sweden. Trace elements were compared according to their solubility during diagenesis. All elements bound to clay minerals or calcite show similar patterns of vector length, while vector length of elements which fit into the aragonite lattice, and are diagenetically mobile, differ. The vector length approach provides a tool to test the diagenetic origin of limestone-marl alternations, to identify initial variations in CaCO3 input and to test a limestone-marl alternation's suitability for cyclostratigraphic analyses.},
author = {Nohl, Theresa and Steinbauer, Manuel and Sinnesael, Matthias and Jarochowska, Emilia},
doi = {10.1111/sed.12885},
faupublication = {yes},
journal = {Sedimentology},
note = {CRIS-Team WoS Importer:2021-06-04},
peerreviewed = {Yes},
title = {{Detecting} initial aragonite and calcite variations in limestone-marl alternations},
year = {2021}
}
@article{faucris.115595084,
author = {Leiste, Volker and Baier, Alfons and Tobschall, Heinz-Jürgen and Göbbels, Matthias},
faupublication = {yes},
journal = {Geologische Blätter für Nordost-Bayern und angrenzende Gebiete},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LAG.diebed},
pages = {243-246},
peerreviewed = {unknown},
title = {{Die} {Bedeutung} der {Geologie} und {Mineralogie} im geplanten {Wissenschaftsmuseum} {Erlangen}},
volume = {49},
year = {1999}
}
@book{faucris.118912904,
address = {Leipzig-Stuttgart},
author = {Schmädicke, Esther},
faupublication = {no},
note = {UnivIS-Import:2017-03-24:Pub.1994.nat.dgeo.IGM.legeo.dieekl},
peerreviewed = {unknown},
publisher = {Deutscher Verlag für Grundstoffindustrie},
title = {{Die} {Eklogite} des {Erzgebirges}. {Freiberger} {Forschungsheft} {C} 456.},
year = {1994}
}
@article{faucris.107326824,
abstract = {Pair distribution functions of ferroelectric xBiScO3-(1-x)PbTiO3, obtained from neutron total scattering data, were examined and modeled utilizing the reverse Monte Carlo technique to depict exclusively the local structure of this compound throughout its reported morphotropic phase boundary (MPB). Microscopic polarizations due to the cation shifts have been mapped out from the refined crystal structure as a function of composition in order to reveal individual cation behavior driven by the composition. Direct evidences are provided for large static displacements of the cations (∼0.2-0.5Å), local cation ordering between Ti and Sc, and a categorical change of favored polarization directions of the cations at the conjuncture of the MPB. Apart from Sc, all cations have demonstrated an apparent transition from a relatively defined directional distribution to a broad and random distribution at x=xMPB, suggesting a flattening of the local potential function for them. These features can further be correlated with the general concept of structural instability of a ferroelectric system at the MPB, which is often linked to the manifestation of enhanced physical properties.},
author = {Datta, Kaustuv and Richter, Andreas and Göbbels, Matthias and Keen, David A. and Neder, Reinhard},
doi = {10.1103/PhysRevB.93.064102},
faupublication = {yes},
journal = {Physical Review B - Condensed Matter and Materials Physics},
peerreviewed = {unknown},
title = {{Direct} mapping of microscopic polarization in ferroelectric x({BiScO3})-(1-x)({PbTiO3}) throughout its morphotropic phase boundary},
volume = {93},
year = {2016}
}
@article{faucris.118272484,
abstract = {Technical OPC normally contains mixed sulphate carriers in varying amounts. Gypsum (calcium sulphate dihydrate, CaSO 4 ·2 H 2O) is added to the clinker before the milling process and dehydrates partially to bassanite (calcium sulphate hemihydrate, CaSO 4 ·0.5 H 2O) and anhydrite (CaSO 4). The dehydration temperature and humidity affects the resulting calcium sulphates. Anhydrite exists in different polymorphs (anhydrite I-III) of which anhydrite III shows the highest reactivity in contact with H 2O. Due to different kinetics of the calcium sulphate phases, which strongly influence hydration, it is very important to be able to characterize the sulphate carrier composition in the cement and in applications with high sulphate content. This study could prove that it is possible to quantify bassanite and anhydrite III in samples of dehydrated gypsum by Rietveld refinement of XRD data especially in mixtures consisting of more than one calcium sulphate modification. © by Oldenbourg Wissenschaftsverlag, München.},
author = {Seufert, Sebastian and Hesse, Christoph and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1524/zksu.2009.0066},
faupublication = {yes},
journal = {Zeitschrift für Kristallographie, Supplement},
keywords = {OPC; Rietveld refinement; Sulphate carrier},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.discri},
pages = {447-452},
peerreviewed = {unknown},
title = {{Discrimination} of bassanite and anhydrite {III} dehydrated from gypsum at different temperatures},
volume = {Suppl. 30},
year = {2009}
}
@article{faucris.117385004,
abstract = {A suitable external standard method which was first described by O'Connor and Raven (1988) ("Application of the Rietveld refinement procedure in assaying powdered mixtures," Powder Diffr.3, 2-6) was used to determine the quantitative phase composition of a commonly used Ordinary Portland Cement (OPC). The method was also applied in order to determine amorphous contents in OPC. Also investigated were the impact of atomic displacement parameters and the microstrain on the calculated amorphous content. The investigations yielded evidence that said parameters do indeed exert an influence on the calculated amorphous content. On the basis of the data produced we can conclude that the method used is entirely to be recommended for the examination of OPC. No significant amorphous content could be proven in the OPC used. © 2011 International Centre for Diffraction Data.},
author = {Jansen, Daniel and Stabler, Christopher and Götz-Neunhoeffer, Friedlinde and Dittrich, Sebastian and Neubauer, Jürgen},
doi = {10.1154/1.3549186},
faupublication = {yes},
journal = {Powder Diffraction},
keywords = {Amorphous content; External standard; G factor; Ordinary Portland Cement},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.doesor},
pages = {31-38},
peerreviewed = {Yes},
title = {{Does} {Ordinary} {Portland} {Cement} contain amorphous phase? {A} quantitative study using an external standard method},
year = {2011}
}
@article{faucris.107297344,
abstract = {An efficient geometric approach to refine anisotropic domain morphology in the double-Voigt approach based on the variance-slope apparent crystallite size was recently described. In this way, the Lorentzian part of the Voigt size contribution can be directly linked to an effective area-or surface-weighted morphology. The size contribution in the Voigt approach is, however, rarely pure Lorentzian. In this article, the previously considered models are extended for the Gaussian part of the size broadening, also taking into account size distributions. The limits of the validity of the Voigt approach are also discussed.},
author = {Ectors, Dominique and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1107/S1600576715018488},
faupublication = {yes},
journal = {Journal of Applied Crystallography},
keywords = {domain size anisotropy; double-Voigt approach;},
pages = {1998-2001},
peerreviewed = {unknown},
title = {{Domain} size anisotropy in the double-{Voigt} approach: {An} extended model},
volume = {48},
year = {2015}
}
@article{faucris.309430165,
abstract = {In this work, we investigated the drying process of a hardened gypsum plaster model (GP) that showed sodium sulfate efflorescence after subsequent exposure to water. Visible efflorescence could be prevented by adding small amounts of calcium formate (CF). Prism samples were prepared to investigate this observation, with an emphasis on chemical processes in the pore water. In the pure plaster, both sodium and sulfur accumulate at the surface of the prism, which leads to sodium sulfate precipitation. In the sample containing CF, calcium slightly accumulates at the surface, which leads to lower sulfur concentrations, because the porewater is in equilibrium with gypsum. Thermodynamic calculations show that higher sodium concentrations are then necessary to reach sodium sulfate supersaturation than without CF. These concentrations are not exceeded during early stages of the drying process, which ultimately leads to the sodium sulfate precipitation inside the prism. Therefore, sodium sulfate efflorescence can be hindered on gypsum plaster by the addition of CF.},
author = {Fobbe, Nicholas and Götz-Neunhoeffer, Friedlinde and Foerthner, Sebastian and Foerster, Henning and Jansen, Daniel},
doi = {10.1617/s11527-023-02213-w},
faupublication = {yes},
journal = {Materials and Structures},
keywords = {Efflorescence; Gypsum plaster; Salt damage; Sodium sulfate; Thermodynamic modelling},
note = {CRIS-Team Scopus Importer:2023-08-18},
peerreviewed = {Yes},
title = {{Drying} of gypsum plaster prisms: prevention of visible sodium sulfate efflorescence through calcium formate addition},
volume = {56},
year = {2023}
}
@article{faucris.208996438,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Okrusch M., Schmidt W.},
doi = {10.1007/BF00310740},
faupublication = {no},
journal = {Contributions To Mineralogy and Petrology},
pages = {226-241},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Eclogite}-facies rocks in the {Saxonian} {Erzgebirge}, {Germany}: high pressure metamorphism under contrasting {P}-{T} conditions},
volume = {110},
year = {1992}
}
@article{faucris.118851084,
abstract = {The metamorphic sequences of the Saxonian Erzgebirge were thoroughly overprinted by a Variscan medium-pressure event under amphibolite facies conditions. However, eclogitic relics documenting an older high-pressure event are widespread. P-T conditions of the eclogite-facies metamorphism systematically decrease, over a distance of 50 km, from about >29 kbar/850°C, in the central part, to 20-24 kbar/650°C, in the westernmost part of the Erzgebirge crystalline complex. A distinct gap in P-T conditions exists between the central and the western Erzgebirge coinciding with the fault zone of the Flöha syncline. Therefore, the eclogitebearing sequences are assumed to represent at least two different nappe units. The lower-grade eclogite assemblages in the western Erzgebirge display a continuous metamorphic zonation with a gradual decrease of peak metamorphic temperatures towards the west. Assemblages formed in the stability field of coesite and thus indicating a regional ultra-high pressure metamorphism, are restricted to the central Erzgebirge, where they are widespread in the eclogites, but also present in metaacidic country rocks. The same high-temperature/high-pressure conditions, testifying to a burial of at least 100 km, were independently recorded for the ultramafic garnet pyroxenites associated with the eclogites of the central Erzgebirge. Mineral relics included in the eclogite phases and mineral assemblages formed by retrograde reactions permit reconstruction of the prograde and retrograde P-T paths in the different parts of the Erzgebirge crystalline complex. © 1992 Springer-Verlag.},
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke Esther, Okrusch M., Schmidt W.},
doi = {10.1007/BF00310740},
faupublication = {no},
journal = {Contributions To Mineralogy and Petrology},
note = {UnivIS-Import:2017-03-24:Pub.1992.nat.dgeo.IGM.profes{\_}1.eclogi},
pages = {226-241},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Eclogite}-facies rocks in the {Saxonian} {Erzgebirge}, {Germany}: {High} pressure metamorphism under contrasting {P} {T} conditions.},
volume = {110},
year = {1992}
}
@article{faucris.113874024,
abstract = {Powders of α-tricalcium phosphate (α-TCP), which readily react with water to form calcium-deficient hydroxyapatite (CDHA), are frequently used in bone cements. As, for clinical applications, it is important to adjust the setting reaction of the cements to a reasonable reaction time, exact knowledge of the hydration mechanism is essential. It is known that prolonged milling results in partial amorphization of α-TCP powders and that dissolution of the amorphous phase significantly accelerates the hydration, but it is not clear yet when the amorphous phase reacts in comparison to the crystalline α-TCP. Therefore the aim of this study was to investigate the development of quantitative phase content of α-TCP samples during hydration. For this purpose, three α-TCP powders, containing 0, 16 and 71 wt.% of amorphous phase (ATCP), were mixed with either deionized water or a 0.1 M Na 2HPO4 aqueous solution. The crystalline evolution of the paste was assessed quantitatively during the first 48 h of hydration at 23 °C by G-factor quantification. The present investigations demonstrate that ATCP reacted earlier than crystalline α-TCP. The results also suggest the formation of an X-ray amorphous phase during the hydraulic conversion formation of α-TCP into CDHA. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
author = {Hurle, Katrin and Neubauer, Jürgen and Bohner, Marc and Döbelin, Nicola and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.actbio.2014.03.017},
faupublication = {yes},
journal = {Acta Biomaterialia},
keywords = {Amorphization; Bone substitute; Calcium phosphate cement; CDHA; Quantitative in situ XRD},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LM.effect},
pages = {3931-3941},
peerreviewed = {unknown},
title = {{Effect} of amorphous phases during the hydraulic conversion of alpha-{TCP} into calcium-deficient hydroxyapatite},
volume = {10},
year = {2014}
}
@incollection{faucris.120137644,
address = {South Africa},
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
booktitle = {Proceedings of the 11th International Congress on the Chemistry of Cement (ICCC): Cement's Contribution to Development in the 21st Century},
editor = {G. Grieve, G. Owens},
faupublication = {yes},
isbn = {9780958408585},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.effect{\_}9},
pages = {695-704},
peerreviewed = {unknown},
publisher = {Cement Concrete Institute of South Africa},
title = {{Effect} of inorganic admixtures on the early hydration of {Monocalciumaluminate} ({CA{\_}1}-{x{\_}F{\_}x{\_}})},
year = {2003}
}
@article{faucris.208972978,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Göbbels, Matthias and Enderle, Ralph},
faupublication = {yes},
journal = {European Cells & Materials},
peerreviewed = {Yes},
title = {{Effect} of {Mg2}+ content on lattice parameter and phase transformation temperature of β-α {TCP}},
url = {https://www.scopus.com/record/display.uri?eid=2-s2.0-84860773066&origin=inward},
volume = {11},
year = {2006}
}
@article{faucris.119728664,
abstract = {The effects of polymer latexes on cement hydration were investigated by the combination of isothermal calorimetry, in-situ XRD and Cryo-SEM. Two model latexes with varied amounts of anionic charges were used for measurements after cleaned by dialysis to remove the serum components. This study confirms that in-situ XRD technique can be successfully adapted to hydrating cementitious systems in the presences of polymer latexes to quantitatively follow evolution of mineral phases involved in cement hydration. Results show that both polymers retard aluminate reaction and depress silicate reaction, by delaying the dissolution of CA, anhydrite and gypsum and consequently the formation of ettringite, and reducing the dissolution of CS and the formation of C-S-H. The anionic colloidal polymers exhibit more pronounced retardation effect on aluminate reaction than on silicate reaction due to stronger electrostatic interaction between the polymer particles and the positively charged aluminate phases. The more charged latex shows stronger retardatio},
author = {Kong, Xiangming and Pakusch, Joachim and Jansen, Daniel and Emmerling, Sebastian and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2016.02.013},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Cement (D); Hydration (A); Latex (D); Retardation (A); X-ray diffraction (B)},
pages = {30-40},
peerreviewed = {Yes},
title = {{Effect} of polymer latexes with cleaned serum on the phase development of hydrating cement pastes},
volume = {84},
year = {2016}
}
@article{faucris.120855724,
abstract = {A study was carried out, using heat flow calorimetry and quantitative X-ray diffractometry, of the different influences which are exerted by types of cationic Polydiallyldimethylammonium (PDADMA) displaying different anionic counterions on the hydration behavior of an Ordinary Portland Cement (OPC). It was shown that the influence of the cationic polymer PDADMA on the hydration of the cement will tend to be strongly dependent on the nature of the anionic counterion. In case of OH-, more calcium sulfate will tend to be dissolved in the early stages, which acts in turn as an accelerator for the hydration of the C3S phase. In case of SO42- there will tend to occur a secondary gypsum precipitation, which will in turn act to lower the Ca 2+ - content in the mix water, leading to a retardation of the hydration process compared to the hydration in absence of polymer. © 2012 Elsevier Ltd. All rights reserved.},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Härzschel, Reinhard and Hergeth, Wolf Dieter},
doi = {10.1016/j.cemconcomp.2012.08.022},
faupublication = {yes},
journal = {Cement & Concrete Composites},
keywords = {Calorimetry; Cement hydration; PDADMAC; Quantitative XRD-analysis},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.effect},
pages = {71-77},
peerreviewed = {Yes},
title = {{Effect} of polymers on cement hydration: {A} case study using substituted {PDADMA}},
year = {2013}
}
@article{faucris.224169298,
abstract = {Objective: With the establishment of CAD/CAM technology, competing lithium silicate based formulations have been introduced for clinical use, but little is known about their phase composition. Here we investigate a commercially available SiO2-Al2O3-K2O-Li2O-P2O5-ZrO2 system to evaluate the crystal phase evolution during the second heat treatment by changing the main crystallization parameters. Methods: With a focus on the final stage of crystallization, we characterized the dimensional changes in the crystallographic structure of the residual Li2SiO3 and the lithium orthophosphate (Li3PO4) phases with variations in crystallization parameters, i.e. time, temperature and cooling rate over the range of the glass transition temperature Tg. The phase fractions (crystalline and glass) and the sizes of coherent scattering domains (CSDs) were resolved by means of quantitative X-Ray Diffraction using Rietveld refinement combined with an external standard method (G-factor). Biaxial flexure testing was conducted to evaluate the influence of crystallization parameters on the characteristic strength and natural defect distribution. Results: An increase in crystallization temperature from 840 to 880 °C resulted in a significant reduction of the Li2Si2O5 content, which indicated a reversion of the Li2SiO3 to Li2Si2O5 phase transformation. Reduction to 800 °C had no significant effect. Furthermore, the CSD sizes of Li2SiO3 and Li3PO4 continuously increased with increasing temperature, which was accompanied by an increase in strength parameters. Reducing the cooling rate over the range of Tg resulted in an increased strength at low failure probabilities. Significance: These findings help to establish recommendations for adjustment of the crystallization protocol, which has potential to increase the clinical reliability of the material investigated.},
author = {Lohbauer, Ulrich and Belli, Renan and Abdalla Alonso, Alexandre and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin},
doi = {10.1016/j.dental.2019.07.002},
faupublication = {yes},
journal = {Dental Materials},
keywords = {Ceramics; Crystallization; Materials science; Restorative materials; X-ray Crystallography},
note = {CRIS-Team Scopus Importer:2019-08-09},
peerreviewed = {Yes},
title = {{Effect} of sintering parameters on phase evolution and strength of dental lithium silicate glass-ceramics},
year = {2019}
}
@article{faucris.123637624,
abstract = {The effect of temperature on the hydration of Portland cement pastes blended with 50 wt.% of siliceous fly ash is investigated within a temperature range of 7 to 80 C. The elevation of temperature accelerates both the hydration of OPC and fly ash. Due to the enhanced pozzolanic reaction of the fly ash, the change of the composition of the C-S-H and the pore solution towards lower Ca and higher Al and Si concentrations is shifted towards earlier hydration times. Above 50 C, the reaction of fly ash also contributes to the formation of siliceous hydrogarnet. At 80 C, ettringite and AFm are destabilised and the released sulphate is partially incorporated into the C-S-H. The observed changes of the phase assemblage in dependence of the temperature are confirmed by thermodynamic modelling. The increasingly heterogeneous microstructure at elevated temperatures shows an increased density of the C-S-H and a higher coarse porosity. © 2013 Elsevier Ltd.},
author = {Deschner, Florian and Lothenbach, Barbara and Winnefeld, Frank and Neubauer, Jürgen and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2013.07.006},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Blended cement (D); Fly ash (D); Hydration (A); Modelling (E); Temperature (A)},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.effect{\_}1},
pages = {169-181},
peerreviewed = {Yes},
title = {{Effect} of temperature on the hydration of {Portland} cement blended with siliceous fly ash},
year = {2013}
}
@inproceedings{faucris.284850328,
abstract = {Common calcium aluminate cements (CAC) may vary in their CA2
to CA ratio. While CA is the main phase of most CACs and is responsible for the
initial strength, the CA2 phase has also received more attention in
the last few decades. The reason for this is the higher Al-content of CA2
and thus the ability to produce more AH3 than CA as well as a higher
thermic stability. In Calciumsulfoaluminate-cements (CSA), AH3 is
considered to promote strength [1]. A gradual increase in the CA2
content and thus a change in the CA2/CA ratio in the clinker in CAC can
be achieved by mixing of two cements, one CA-rich and one CA2-rich
CAC. According to this approach, two industrial CACs were mixed in this work
and six different CA2/CA-ratios were analysed with the following
methods: QXRD after 1, 7 and 28 days of hydration demonstrates the quantitative
progress of hydration, the clinker phase hydration degree as well as changes in
AH3 and other hydrate phase quantities over time. Micro-computer
tomography (µ-CT) of selected mixtures after 28 days enables a
three-dimensional, non-destructive view of the inside of the sample, porosity
and density heterogenities. The newly introduced B3B-method [2] for testing of
the flexural strength in combination with the data evaluation according to
Weibull (all mixes after 7 and 28 days) allows an interpretation of the
mechanical properties. The combination of these three methodologies reveals
that the mechanical properties deteriorate significantly from a CA2/CA
ratio of 70:30 on to higher ones. The reasons for this are the macro-porosity,
insufficient amounts of CA in the non-hydrated residue and differences in
viscosity.
[1] Chang J, Zhang Y, Shang X, Zhao X, Yu X. Effects of amorphous
AH3 phase on mechanical properties and hydration process of C4A3š-CšH2-CH-H2O
system. Construction and Building
Materials 2017:133:314–322.
[2] Börger A, Supancic P, Danzer R. The ball on three balls
test for strength testing of brittle discs: stress distribution in the disc. J
Eur Ceram Soc. 2002;22:1425-36.
<},
author = {Goergens, Julian and Belli, Renan and Schulbert, Christian and Götz-Neunhoeffer, Friedlinde},
booktitle = {4th International Conference on the Chemistry of Construction Materials - ICCCM 2022},
date = {2022-09-26/2022-09-28},
faupublication = {yes},
peerreviewed = {No},
title = {{Effect} of varying {CA2}/{CA} ratios in {Calcium}-{Aluminate}-{Calcite}-mixtures analysed by combined {QXRD}, µ-{CT} and flexural-strength testing},
venue = {Karlsruhe},
year = {2022}
}
@inproceedings{faucris.110633204,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
booktitle = {20th International Conference on Cement Microscopy},
faupublication = {yes},
note = {UnivIS-Import:2015-03-05:Pub.1998.nat.dgeo.IGM.LM.effect},
pages = {130-138},
peerreviewed = {unknown},
title = {{Effects} of {Raw} {Meal} {Substitution} by {Sewage} {Sludge} on {OPC} {Clinker} studied by {Rietveld} {Analysis}},
venue = {Guadalajara},
year = {1998}
}
@article{faucris.208969243,
author = {Lu, Zichen and Kong, Xiangming and Zhang, Chaoyang and Jansen, Daniel and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconcomp.2018.11.014},
faupublication = {yes},
journal = {Cement & Concrete Composites},
keywords = {Nucleation; Polymer latex; Cement hydration; Ionic charge; Adsorption},
pages = {66-76},
peerreviewed = {Yes},
title = {{Effects} of two oppositely charged colloidal polymers on cement hydration},
volume = {96},
year = {2019}
}
@inproceedings{faucris.122378124,
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
booktitle = {Proceedings of the 24th International Conference on Cement Microscopy},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LM.effici},
pages = {58-68},
peerreviewed = {unknown},
title = {{Efficiency} of highly sensitive heat flow calorimetry in examination of {OPC} hydration},
venue = {San Diego},
year = {2002}
}
@article{faucris.263246528,
abstract = {The drying process of a technical flue gas desulphurization (FGD) gypsum body was studied. At low surface-to-volume ratios, it showed a significant efflorescence of hexahydrite (MgSO4·6H2O) after less than one day. A countermeasure against this phenomenon is the addition of small amounts of Ordinary Portland Cement (OPC) (0.2 wt%). Prisms of pure FGD and FGD-OPC mixtures were synthesized and investigated with a combination of 1H-TD-NMR and ICPMS measurements to monitor both the physical water content during the drying process and the chemical pore water composition within the first 48 h. The experiments showed no differences in the drying rate and pore water distribution and only small differences in the pore water composition. In combination with thermodynamic calculations, the prevention of efflorescence could be attributed to chemical processes in the pore water. Mg-sulfates potentially can form on both samples with the same chance. Therefore, it was concluded that OPC can only hinder efflorescence indirectly by decreasing the Mg concentration in the pore water. An increase in pH can cause Mg-phases to precipitate, thereby binding the Mg before Mg-sulfates can form on the surface of the body. Further calculations revealed, that the two phases hydrotalcite and M−S−H can potentially form inside the FGD-OPC prism, probably due to an increase of the pH.},
author = {Fobbe, Nicholas and Götz-Neunhoeffer, Friedlinde and Foerster, H. and Foerthner, S. and Jansen, D.},
doi = {10.1016/j.conbuildmat.2021.124445},
faupublication = {yes},
journal = {Construction and Building Materials},
keywords = {Drying process; Efflorescence; Gypsum; Solubility; Thermodynamic calculation},
note = {CRIS-Team Scopus Importer:2021-08-27},
peerreviewed = {Yes},
title = {{Efflorescence} during the drying of a technical gypsum body: {Application} of thermodynamic principles},
volume = {303},
year = {2021}
}
@article{faucris.110320364,
author = {Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1990.nat.dgeo.IGM.LM.einbau},
pages = {190},
peerreviewed = {Yes},
title = {{Einbau} von {Schwermetallen} in {Silikatapatite}},
year = {1990}
}
@incollection{faucris.111233364,
author = {Enderle, Ralph and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
booktitle = {GDCh-Monographien},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-27-3},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LM.einflu{\_}4},
pages = {197-201},
peerreviewed = {unknown},
title = {{Einfluss} {Ca}-reicher {Additive} in {Verbindung} mit {Li2CO3} auf das {Hydratationsverhalten} von {Monocalciumaluminat}},
volume = {31},
year = {2004}
}
@incollection{faucris.111226104,
author = {Schmitt, Dirk and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Degenkolb, Matthias and Holland, Uwe},
booktitle = {GDCh-Monographie Bauchemie},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-27-3},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LM.einflu{\_}1},
pages = {263-270},
peerreviewed = {unknown},
title = {{Einfluss} der {Präparationstechnik} auf den {Wärmefluss} bei der {Hydratation} eines {Portlandzementes}},
volume = {31},
year = {2004}
}
@incollection{faucris.116356944,
author = {Steinert, Susanne and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
booktitle = {GDch Monographien},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-37-0},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.einflu},
pages = {318-319},
peerreviewed = {unknown},
title = {{Einfluss} des {Alits} auf die {Anfangshydratationswärme} von {Portlandzementen}},
volume = {35},
year = {2005}
}
@book{faucris.310823042,
abstract = {Im geplanten Lehrbuch werden insbesondere Bachelor-Studenten der Geo- und Materialwissenschaften wichtige stoffliche und technologische Grundlagen in verschiedenen technischen Systemen und angewandten geowissenschaftlichen Bereichen vermittelt. Ausgehend von der Mineralogie ausgewählter nichtmetallischer Rohstoffe und Industrieminerale werden Zusammenhänge zwischen Eigenschaften und industriellen Einsatzmöglichkeiten dargelegt sowie umweltrelevante Aspekte diskutiert. Eine Einführung erfolgt in wichtige mineralogische und physikalisch-chemische Aspekte technischer keramischer Massenprodukte wie Silikatkeramik, Glas, Zement, Feuerfestmaterialien oder der Mineralsynthese.
29Si NMR, thermal analysis, scanning electron microscopy, and inductively coupled plasma-optical emission spectroscopy were used to investigate the system evolution. The time-dependent pore solution composition is also provided to gain further information. HXCT and NF-PXCT show comparable values regarding the evolution of the C3S particle size distribution during hydration, indicating that C3S particles smaller than 1.3 μm are completely dissolved after 20 h of hydration. The results can be reasonably reproduced by numerical models if for all particle sizes a constant reacted rim thickness for each degree of hydration is assumed. Data on the aqueous phase composition are also provided.},
author = {Neubauer, Jürgen and Sowoidnich, T. and Valentini, L. and Schulbert, Christian and Naber, Christoph and Rößler, C. and DaSilva, J. and Bellmann, F.},
doi = {10.1016/j.cemconres.2022.106769},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Holography (B); Hydration (A); Near-field ptychography (B); Synchrotron nano-tomography (B); Tricalcium silicate (D)},
note = {CRIS-Team Scopus Importer:2022-03-18},
peerreviewed = {Yes},
title = {{Evolution} of the particle size distribution of tricalcium silicate during hydration by synchrotron {X}-ray nano-tomography},
volume = {156},
year = {2022}
}
@article{faucris.209001302,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Will T.},
doi = {10.1130/G22170.1},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {Eclogite facies metamorphism; Antarctica; Shackleton Range; Pan-African; Ultramafic rocks},
pages = {133-136},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{First} evidence of eclogite facies metamorphism in the {Shackleton} {Range}, {Antarctica}: {Trace} of a suture between {East} and {West} {Gondwana}?},
volume = {34},
year = {2006}
}
@article{faucris.119441564,
author = {Toniolo, Nicoletta and Taveri, Gianmarco and Hurle, Katrin and Roether, Judith and Ercole, P and Dlouhy, Ivo and Boccaccini, Aldo R.},
doi = {10.4416/JCST2017-00053},
faupublication = {yes},
journal = {Journal of Ceramic Science and Technology},
keywords = {Fly ash; Geopolymers; Red mud; Waste glass},
pages = {411-419},
peerreviewed = {unknown},
title = {{Fly}-ash-based geopolymers: {How} the addition of recycled glass or red mud waste influences the structural and mechanical properties},
volume = {8},
year = {2017}
}
@article{faucris.111874664,
abstract = {This study examines the hydration kinetics of hydrate-sphere formation. This is a form of heterogeneous setting and can frequently be observed in ternary binder mixtures high in Portland cement and containing calcium aluminate cement and CaSO4, which are retarded by means of tartaric acid. In many cases, the phenomenon of hydrate-sphere formation is the result of aging of the dry mix - quick-setting ternary binder mixtures, in particular, are severely prone to pre-hydration once the package has been opened. Formation of hydrate spheres can be eliminated only to a limited extent via minor adjustments of the formulation, with the result, ultimately, that the formulator is in many cases obliged to reevaluate the entire mineral binder system, including the retarder-accelerator system.},
author = {Götz-Neunhoeffer, Friedlinde and Zubriggen, Roger},
faupublication = {yes},
journal = {Zkg International},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2008.nat.dgeo.IGM.LM.format},
pages = {68-76},
peerreviewed = {Yes},
title = {{Formation} of hydrate spheres in ternary binder systems},
volume = {61},
year = {2008}
}
@article{faucris.240105635,
author = {Brandt, Sönke and Klemd, Reiner and Haase, Karsten and Faßbender, Marc Lorin and Vennemann, Torsten},
doi = {10.1093/petrology/egaa010},
faupublication = {yes},
journal = {Journal of Petrology},
peerreviewed = {Yes},
title = {{Formation} of the {Vergenoeg} {F}-{Fe}-{REE} deposit ({South} {Africa}) by accumulation from a ferroan silicic magma},
year = {2020}
}
@inproceedings{faucris.200234606,
abstract = {Mit der Suche nach alternativen Energieformen steigt auch wieder das Interesse an der Nutzung der tiefen Erdwärme. Mehrere Geothermie-Anlagen im Molassebecken sind bereits in Betrieb, wobei die meisten davon die geklüfteten Malm-Karbonate als Ziel-Reservoir angebohrt haben. Für ein verbessertes Systemverständnis dieses Reservoirs werden häufig Analog-Aufschlüsse auf der Fränkischen Alb herangezogen, da die im Molassebecken versenkten Karbonate hier an der Oberfläche austreten. Jedoch ist es bei der Verwendung von Reservoir-Analogen von großer Bedeutung, welche Versenkungsgeschichte die jeweiligen Gesteine erfahren haben, denn dies kann einen entscheidenden Einfluss auf die petrophysikalischen Eigenschaften der Aufschlussanaloge haben. Die Versenkungsgeschichte wurde für die Fränkische Alb bisher kaum untersucht. Ziel der vorliegenden Studie ist es die Versenkungsgeschichte mit Hilfe verschiedener Untersuchungsmethoden an den den Malm unterliegenden Dogger- und Lias-Tonen zu bestimmen. Dazu werden Methoden wie die Vitrinit-Reflexion sowie der Vergleich von Kompaktionstrends aus Bohrungen aus dem Bayerischen Molassebecken und Literaturdaten herangezogen. Verwendet werden dafür sowohl Tone, welche aus aktiven und stillgelegten Tongruben entnommen wurden, als auch Lias- und Dogger-Tone aus flachen Bohrungen. Erste Analysen der Gruben-Tone weisen bei einem Vergleich der Kompaktionstrends mit Bohrdaten aus dem Molassebecken eine Versenkungstiefe von ca. 500-1000 m auf. Diese Tiefenangabe ist jedoch erst eine grobe Einschätzung der tatsächlichen erfahrenen Versenkungstiefe, ein Abgleich mit den beschriebenen Messmethoden wird im nächsten Projektschritt durchgeführt.
1800 Ma old zircon and a prominent age gap between 1800 and 1000 Ma imply a Gondwanan zircon source and indicate the presence of Cadomian material in the Odenwald-Spessart basement. Group 2 diorite is exposed over a distance of at least 60 km from the easternmost Spessart to the westernmost Odenwald and is expected to underlie the eastern Odenwald basement. We suggest that Group 2 diorite formation was related to the presence of a mantle plume, which was also responsible for the widespread Carboniferous magmatism and the associated high-temperature metamorphism in the Odenwald-Spessart basement and other areas of the Variscan orogen.},
author = {Will, Thomas M. and Schmädicke, Esther and Ling, Xiao-Xiao and Li, Xian-Hua and Li, Qiu-Li},
doi = {10.1016/j.lithos.2021.106454},
faupublication = {yes},
journal = {Lithos},
note = {CRIS-Team WoS Importer:2021-10-15},
peerreviewed = {Yes},
title = {{Geochronology}, geochemistry and tectonic implications of {Variscan} granitic and dioritic rocks from the {Odenwald}-{Spessart} basement, {Germany}},
volume = {404-405},
year = {2021}
}
@article{faucris.120141164,
abstract = {Kalk, Gips, Anhydrit, Ton und Sand spielen neben anderen Rohstoffen nicht nur als Baustoffe im Laufe der Entwicklung der Menschheit eine wichtige Rolle. Vom ersten luftgetrockneten Lehmziegel bis zu den heutigen modernen Produkten der Baustoff-Industrie hat sich im Laufe der Jahrtausende eine bemerkenswerte Produktentwicklung und Spezialisierung vollzogen. Dies stellt hohe Anforderungen an die Qualität der Rohstoffe, aber auch an die Abbautechniken und besonders an die Weiterverarbeitung. Gips und Anhydrit sind chemisch sehr ähnlich. Als Anhydrit wird das wasserfreie CaSO4 bezeichnet, wogegen Gips zusätzliches Kristallwasser einbaut und als CaSO4 · 2 H2O beschrieben wird. In technischen Produkten tritt auch das sog. Halbhydrat auf, das der Zusammensetzung CaSO4 · 1/2 H2O entspricht. Im Rahmen der Exkursion werden der Anhydrit-Abbau und die Aufbereitung in der Grube Hüttenheim bei Iphofen sowie die Gipsputz- bzw. die Gipskartonplatten-Herstellung in verschiedenen Produktionsbetrieben der Fa. Knauf in der Umgebung des Standortes Iphofen vorgestellt.},
author = {Göbbels, Matthias and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
faupublication = {yes},
journal = {Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.gipsun},
pages = {65-72},
peerreviewed = {No},
title = {{Gips} und {Anhydrit} als {Rohstoff} für die {Baustoffindustrie} - {Vorkommen}, {Abbau} und {Weiterverarbeitung}},
volume = {85},
year = {2003}
}
@article{faucris.270414277,
abstract = {Objectives: Lithium-based glass-ceramics are currently dominating the landscape of dental restorative ceramic materials, with new products taking the market by storm in the last years. Though, the difference among all these new and old products is not readily accessible for the practitioner, who faces the dilemma of reaching a blind choice or trusting manufacturers' marketing brochures. To add confusion, new compositions tend to wear material terminologies inherited from vanguard dental lithium disilicates, disregarding accuracy. Here we aim to characterize such materials for their microstructure, crystalline fraction, glass chemistry and mechanical properties. Methods: Eleven commercial dental lithium-based glass ceramics were evaluated: IPS e.max (R) CAD, IPS e.max (R) Press, Celtra (R) Duo, Suprinity (R) PC, InitialTM LiSi Press, InitialTM LiSi Block, Amber (R) Mill, Amber (R) Press, N!CE (R), Obsidian (R) and CEREC TesseraTM. The chemical composition of their base glasses was measured by X-Ray Fluorescence Spectroscopy (XRF) and Inductive Coupled Plasma Optical Emission Spectroscopy (ICPOES), as well as the composition of their residual glass by subtracting the oxides bound in the crystallized fraction, characterized by X-Ray Diffraction (XRD) and Rietveld refinement, and quantified accurately using the G-factor method (QXRD). The crystallization behavior is revealed by differential scanning calorimetry (DSC) curves. Elastic constants are provided from Resonant Ultrasound Spectroscopy (RUS) and the fracture toughness measured by the Ball-on-Three-Balls method (B3B- K Ic). The microstructure is revealed by fieldemission scanning electron microscopy (FE-SEM). Results: The base glasses showed a wide range of SiO2 /Li2O ratios, from 1.5 to 3.0, with the degree of depolymerization dropping from 1/2 to 2/3 of the initial connectivity. Materials contained Li2SiO3+Li3PO4, Li2SiO3+Li3PO4+Li2Si2O5, Li2Si2O5+Li3PO4+ Cristobalite and/or Quartz and Li2Si2O5+Li3 PO4+LiAlSi2O6, in crystallinity degrees from 45 to 80 vol%. Crystalline phases could be traced to their crystallization peaks on the DSC curves. Pressable materials and IPS e.max (R) CAD were the only material showing micrometric phases, with N!CE (R) and InitialTM LiSi Block showing solely nanometric crystals, with the rest presenting a mixture of submicrometric and nanometric particles. Fracture toughness from 1.45 to 2.30 MPa root m were measured, with the linear correlation to crystalline fraction breaking down for submicrometric and nanometric crystal phases. Significance: Dental lithium-based silicate glass-ceramics cannot be all put in the same bag, as differences exist in chemical composition, microstructure, crystallinity and mechanical properties. Pressable materials still perform better mechanically than CAM/CAM blocks, which loose resistance to fracture when crystal phases enter the submicrometric and na-nometric range (c) 2021 The Academy of Dental Materials. Published by Elsevier Inc. All rights reserved.},
author = {Lubauer, Julia and Belli, Renan and Peterlik, Herwig and Hurle, Katrin and Lohbauer, Ulrich},
doi = {10.1016/j.dental.2021.12.013},
faupublication = {yes},
journal = {Dental Materials},
note = {CRIS-Team WoS Importer:2022-03-04},
pages = {318-332},
peerreviewed = {Yes},
title = {{Grasping} the {Lithium} hype: {Insights} into modern dental {Lithium} {Silicate} glass-ceramics},
volume = {38},
year = {2022}
}
@article{faucris.120096504,
abstract = {Defined growth of high-quality crystalline diamond films is necessary for manufacturing of electronic devices. Several groups have already worked on this topic and the main challenges remaining are the suppression of crystalline defects, the reduction of impurities and higher growth rates. High-quality homoepitaxial diamond films were produced in a hot filament chemical vapor deposition (HF-CVD) system with and without addition of nitrogen to the gas phase. Substrates were (100)-oriented synthetic Ib diamonds (Sumitomo) with a maximum misorientation angle of 0.3° as determined by X-ray diffraction. By adjusting the α parameter independently to a value close to two using polycrystalline diamond films on silicon growth rates of up to 500 nm/h could be achieved while simultaneously keeping the density of unepitaxial crystallites below 10 cm-2. The surface roughness (RMS) was below 1 nm in a 1 × 1-μm2 area. Impurities were studied by photoluminescence and cathodoluminescence spectroscopy. For the films deposited without intentional nitrogen addition, nitrogen-related impurities could only be detected by low temperature photoluminescence indicating a very low concentration. At 1.68 eV we observed the signature of the Si-vacancy complex probably caused by evaporation of Si from the tungsten filament. © 2002 Elsevier Science B.V. All rights reserved.},
author = {Stammler, Markus and Eisenbeiß, Henrick and Ristein, Jürgen and Neubauer, Jürgen and Göbbels, Matthias and Ley, Lothar and Ristein, Jürgen and Ley, Lothar},
doi = {10.1016/S0925-9635(01)00627-6},
faupublication = {yes},
journal = {Diamond and Related Materials},
keywords = {Diamond growth and characterization; HF-CVD; Homoepitaxy; Luminescene},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LM.growth},
pages = {504-508},
peerreviewed = {Yes},
title = {{Growth} of high-quality homoepitaxial diamond films by {HF}-{CVD}},
volume = {11},
year = {2002}
}
@article{faucris.108536824,
author = {Boß, Martin and Murgan, Andreas and Bauer, Frank and Göbbels, Matthias},
faupublication = {yes},
journal = {Magazin für digitale Editionswissenschaften},
keywords = {Edition; Numismatik; Datenbank},
pages = {7-19},
peerreviewed = {Yes},
title = {{Grundsätzliche} {Überlegungen} zur {Edition} des {Bestandes} an {Münzen} der {FAU} als frei zugängliche {Datenbank} im {WWW}},
url = {https://www.mde.fau.de/files/2017/03/MdE{\_}Band3{\_}Boss{\_}Murgan{\_}Bauer{\_}G%C3%B6bbels.pdf},
volume = {3},
year = {2017}
}
@article{faucris.267491628,
abstract = {Major and trace elements in omphacite, including hydrogen, were determined in eclogites from two Variscan basement complexes in Germany: Erzgebirge (EG) and Fichtelgebirge (FG). Erzgebirge eclogite is derived from three units, showing different peak pressure (P) and temperature (T) conditions (Unit 1: 840-920 degrees C/>= 30 kbar, Unit 2: 670-730 degrees C/24-26 kbar, Unit 3: 600-650 degrees C/20-22 kbar). The peak conditions of FG eclogite (690-750 degrees C/25-28 kbar) resemble those of EG Unit 2. Coesite eclogite occurs in EG Unit 1, and quartz eclogite in all other units. Omphacite from all samples shows four infrared (IR) absorption bands. Two prominent, sharp bands occur at 3,455 +/- 10 cm(-1) (band II) and 3,522 +/- 10 cm(-1) (band III). Band II is usually more prominent than band III, except for few samples with low jadeite content. A further, broad band is centred between 3,270 and 3,370 cm(-1) (band I) and a fourth, minor band at 3,611-3,635 cm(-1) (band IV). Bands II and III are due to hydrogen bound as structural OH- ions in omphacite. In most cases, this also applies to band IV. However, some spectra with extremely large type IV bands reflect phengite inclusions. The ambiguous band I may be due to different H2O species (molecular water, structural OH, and water in phengite). Omphacite of quartz eclogite has lower contents of TiO2, Zr, Hf, and REE, compared with that from coesite eclogite. By contrast, omphacite in quartz eclogite from both EG (H2O sample averages: 465-852 ppm) and FG (546-1,089 ppm) contains the same amount of structural OH (concentrations given in wt.-ppm H2O) as omphacite in coesite eclogite (492-1,140 ppm). The obtained difference in the garnet-omphacite H2O partition coefficient between quartz (0.01-0.03) and coesite eclogite (0.08-0.11) results from different H2O contents in garnet (coesite eclogite: 50-150 ppm; quartz eclogite: <2-50 ppm; Gose & Schmadicke, 2018). The total content of structural OH in omphacite is unrelated to its major and trace element composition. However, treating the individual IR bands separately, a relation between OH and mineral composition is observed. The OH amount defined by band II is positively correlated to Ti and tetrahedral Al, and that of band III shows a positive correlation with Ca and a negative one with Na (and jadeite). Both the total OH content of omphacite and the partial contents deduced from individual IR bands are unrelated to PT conditions. This implies that omphacite incorporated its structural H2O mainly in the quartz stability field, presumably during initial omphacite growth. Conversely, most OH in garnet was derived from the final breakdown of the last remaining calcic amphibole close to or within the coesite stability field. Our data suggest that coesite eclogite is able to transport a significant amount of H2O (average 550 ppm, maximum 730 ppm), corresponding to that in 3-4 vol.% calcic amphibole, via subduction to depths beyond 100 km. However, the majority of water liberated by dehydration reactions during subduction, including the breakdown of 5-10 vol.% eclogite facies and >10 vol.% pre-eclogitic hydrous minerals, is not preserved in eclogite but liberated to the mantle wedge.},
author = {Gose, Jürgen and Schmädicke, Esther},
doi = {10.1111/jmg.12642},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
note = {CRIS-Team WoS Importer:2021-12-24},
peerreviewed = {Yes},
title = {{H2O} in omphacite of quartz and coesite eclogite from {Erzgebirge} and {Fichtelgebirge}, {Germany}},
year = {2021}
}
@article{faucris.119865504,
author = {Eisenbeiß, Henrick and Stammler, Markus and Ristein, Jürgen and Ley, Lothar and Göbbels, Matthias and Neubauer, Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2001.nat.dgeo.IGM.LM.herste},
pages = {48},
peerreviewed = {Yes},
title = {{Herstellung} und {Charakterisierung} stickstoffreicher, qualitativ hochwertiger homo-epitaktischer {Diamantfilme} mittels {Heißdraht}-{CVD}},
volume = {13},
year = {2001}
}
@article{faucris.209003318,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Gose J., Will T.},
doi = {10.1016/j.lithos.2011.02.014},
faupublication = {yes},
journal = {Lithos},
keywords = {Infrared spectroscopy; Geothermobarometry; Nominally anhydrous minerals; Mid-Atlantic Ridge; Spinel peridotite; Orthopyroxene},
pages = {308-320},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Heterogeneous} mantle underneath the {North} {Atlantic}: {Evidence} from water in orthopyroxene, mineral composition and equilibrium conditions of spinel peridotite from different locations at the {Mid}-{Atlantic} {Ridge}},
volume = {125},
year = {2011}
}
@article{faucris.255635756,
author = {Spies, Alexandra and Bauer, Marius and Klaus, Sebastian and Buhr, Andreas and Göbbels, Matthias},
doi = {10.1007/s42410-020-0148-6},
faupublication = {yes},
journal = {Keramische Zeitschrift},
note = {CRIS-Team Scopus Importer:2021-04-19},
pages = {34-41},
peerreviewed = {unknown},
title = {{Hexa}-{Aluminat} {Mischkristallphasen} in spinellhaltigen {Feuerbetonen} - {Mineralogische} {Untersuchungen} im {System} {CaO}-{Al2O3}-{MgO}},
volume = {72},
year = {2020}
}
@article{faucris.112007544,
abstract = {The iron rich part of the system was examined in the temperature range of 1200-1380 °C in air, with focus on the solid solutions of M-type hexaferrites. Samples of suitable compositions were studied by electronprobe microanalysis (EPMA). Substituted Sr-hexaferrites in the system Sr-La-Co-Fe-O do not follow the 1:1 substitution mechanism of La/Co in M-type ferrites. Due to the presence and limited Co2+-incorporation Fe3+-ions are reduced to Fe2+ within the crystal lattice to obtain charge balance. In all examined M-type ferrites divalent iron is formed, even at 1200 °C. The substitution principle Sr2++Fe3+↔La3++(Fe2+, Co2+) yields to the general substitution formula for the M-type hexaferrite Sr2 +1 - x La3 +x Fe2 +x - y Co2 +y Fe3 +12 - x O19 (0≤x≤1 and 0≤y≤x). In addition Sr/La-perovskiteSS (SS=solid solution), Co/Fe-spinelSS, hematite and magnetite are formed. Sr-hexaferrite exhibits at 1200 °C a limited solid solution with small amounts of Fe2+ (SrFe12O19↔Sr0.3La0.7Co 0.5Fe2+0.2Fe11.3O 19). At 1300 and 1380 °C a continuous solid solution series of the M-type hexaferrite is stable. SrFe12O19 and LaCo0.4Fe2+0.6Fe11O 19 are the end members at 1300 °C. The maximum Fe2+O content is about 13 mol% in the M-type ferrite at 1380 °C LaCo0.1Fe2+0.9Fe11O19 © 2009 Elsevier Inc. All rights reserved.},
author = {Langhof, Nico and Göbbels, Matthias},
doi = {10.1016/j.jssc.2009.07.024},
faupublication = {yes},
journal = {Journal of Solid State Chemistry},
keywords = {Hexagonal ferrites; La-Co substitution; M-type; Solid solution; SrFe},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.hexafe},
pages = {2725-2732},
peerreviewed = {Yes},
title = {{Hexaferrites} an phase relations in the iron-rich part of the system {Sr}-{La}-{Co}-{Fe}-{O}},
volume = {182},
year = {2009}
}
@incollection{faucris.120142484,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
booktitle = {Bauchemie - Von der Forschung zur Praxis},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-21-4},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.hierar},
pages = {20-26},
peerreviewed = {unknown},
series = {GDCh-Monographie Bauchemie},
title = {{Hierarchisch} strukturierte zellulare {Funktionsmaterialien} aus {Calcium}-{Aluminat}-{Zement}},
volume = {27},
year = {2003}
}
@article{faucris.208997265,
author = {Schmädicke, Esther and et al.},
author_hint = {Klemd R., Schmadicke E.},
faupublication = {no},
journal = {Chemie Der Erde-Geochemistry},
pages = {241-261},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{High}-pressure metamorphism in the {Munchberg} {Gneiss} {Complex} and the {Erzgebirge} {Crystalline} {Complex}: the influence of fluid and reaction kinetics},
url = {https://www.scopus.com/record/display.uri?eid=2-s2.0-0028592347&origin=inward},
volume = {54},
year = {1994}
}
@article{faucris.282408674,
abstract = {Calcium aluminate cement (CAC) can contain mayenite (C12A7) as a minor phase which can influence the early hydration. Since CAC hydration is known to be extremely temperature dependent, this study presents the valuable effect of C12A7 dissolution on the early hydration at different temperatures (10, 23 and 35 °C). A reference system without C12A7 and a mixture with 4 wt% C12A7 in the cement phase was investigated using heat flow calorimetry, QXRD and pore solution measurements. In the reference system, a clear induction phase without reactions was observed at all three temperatures, whereas with C12A7, heat flow and reactions were observed at each temperature, as C12A7 was observed to dissolve instantly after water addition accompanied by C2AH8 precipitation. Saturation indices of C2AH8 are slightly higher with the addition of C12A7, which indicates a higher supersaturation of C2AH8 and explains the measured precipitation before the actual CAC main reaction.},
author = {Köhler, Andreas and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2022.106972},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Acceleration; Calcium aluminate cement; Calorimetry; Hydration; Pore solution; Temperature; X-ray diffraction},
note = {CRIS-Team Scopus Importer:2022-09-30},
peerreviewed = {Yes},
title = {{How} {C12A7} influences the early hydration of calcium aluminate cement at different temperatures},
volume = {162},
year = {2022}
}
@article{faucris.115769324,
abstract = {The reaction of a sample with mainly coarse particles of CA (d(50) = 50 mu m) is characterized by a low hydration rate and only 34 rel.-% of CA dissolved after 22 h. Whereas in a very fine CA-sample (d(50) = 4 mu m) hydration starts delayed but then shows the highest hydration rate and a dissolution of 62 rel.-% CA. The behaviour is explained by the coverage of CA-particles with a dense hydrate layer of C(2)AH(x) and AH(x). This reacted CA-rim is supposed to have the same thickness for different sized CA-particles. Optimization of Gauss distribution curves, which were applied to simulate a more realistic particle size distribution, leads to a reacted rim thickness of 1.3 mu m until reaction is stopped. (C) 2014 Elsevier Ltd. All rights reserved.},
author = {Klaus, Sebastian and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2014.08.001},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Hydration (A); Calorimetry (A); Reaction (A); X-ray diffraction (B); Calcium aluminate cement (D)},
month = {Jan},
pages = {11-20},
peerreviewed = {Yes},
title = {{How} to increase the hydration degree of {CA} - {The} influence of {CA} particle fineness},
volume = {67},
year = {2015}
}
@article{faucris.119441784,
abstract = {Calcium phosphate cements (CPCs) are applied as bone cements due to their excellent biocompatibility. In the present study, the quantitative phase content development during hydration of partially amorphized β-tricalcium phosphate (β-TCP) within the first 24 h was investigated by in-situ X-ray diffraction (XRD) combined with the G-factor method, an external standard method. The quantity of amorphous phase (ATCP) in the powders was determined by the G-factor method. The hydration model established for partially amorphized β-TCP indicates that ATCP reacted first, followed by the hydration of a small fraction of crystalline β-TCP starting after some h. Consequently, hydration resulted in biphasic samples composed of calcium deficient hydroxyapatite (CDHA) and crystalline β-TCP. The ratio wt%(CDHA)/wt%(β-TCP) after 24 h hydration was adjustable by the initial ATCP content. The crystallinity of CDHA was nearly independent of the ATCP content. Since the biological degradability of CDHA and β-TCP differ, the degradation performance of the set cements is expected to be adjustable by varying the ATCP content. The present study provided a basic understanding of the hydration mechanism of partially amorphized β-TCP, which is the prerequisite for the development of applicable CPC formulations. Statement of Significance Calcium phosphate cements (CPCs) are medically applied for bone repair due to their excellent biocompatibility. β-Tricalcium phosphate (β-TCP), which is hardly reactive in water in its crystalline state, was previously shown to be activatable by partial amorphization. This provides potential for the development of new CPCs setting to biphasic samples composed of β-TCP and calcium deficient hydroxyapatite (CDHA). The degradation performance of these cements is expected to be adjustable by varying the ratio of CDHA to β-TCP. In the present study, the so far unknown setting mechanism of partially amorphized β-TCP was investigated in detail. The results contribute to the basic understanding of the hydration of partially amorphized β-TCP, which is important for the targeted development of new cement formulations.
2 is known to be weakly hydraulic. Therefore, the hydration kinetics of CA2 were not of as great interest as those of the hydration of CAC. We were able to show that the hydration of CA2 begins as soon as the hydration rate of CA has reached its maximum and the first precipitation of C2AH8 has started. The hydration of different CA/CA2 ratios was analyzed by the G-factor quantification. The individual contributions of the phases CA and CA2 to the heat flow were calculated based on the amounts dissolved by applying thermodynamic data. The heat flow as calculated from XRD data was then compared with the measured heat flow. It obtained a good consistency between the two. The very pronounced influence of CA2 during hydration of CAC can be clearly demonstrated. © 2012 Elsevier Ltd. All rights reserved.},
author = {Klaus, Sebastian and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2012.09.005},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium aluminate cement (D); Calorimetry (A); Hydration (A); Reaction (A); X-ray diffraction (B)},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.hydrat},
pages = {62-69},
peerreviewed = {Yes},
title = {{Hydration} kinetics of {CA2} and {CA} - {Investigations} performed on a synthetic calcium aluminate cement},
year = {2013}
}
@inproceedings{faucris.118125084,
author = {Götz-Neunhoeffer, Friedlinde},
booktitle = {Proceedings of the Centenary Conference 2008,},
date = {2008-06-30/2008-07-03},
editor = {C. H. Fentiman, K. L. Scrivener , R. J. Mangabhai},
faupublication = {yes},
isbn = {978-1-84806-045-6},
note = {UnivIS-Import:2015-04-16:Pub.2008.nat.dgeo.IGM.LM.hydrat{\_}9},
pages = {181-196},
peerreviewed = {unknown},
publisher = {Cement and Concrete Science},
title = {{Hydration} kinetics of calcium aluminate cement in presence of {Li2CO3}},
venue = {Avignon},
year = {2008}
}
@phdthesis{faucris.210823803,
abstract = {- The hydration of tricalcium silicate (C3S) is a dissolution precipitation process. The dissolution of C3S delivers ions to the pore solution and the hydration products Calcium-Silicate-Hydrate (C-S-H) and portlandite (CH) consume said ions by precipitating from the pore solution. The underlying kinetics of the coupled reaction are to this day not fully understood. This thesis presents efforts to investigate the C3S - water interface at the nanoscale and a comprehensive dataset to calculate individual C3S dissolution rates and C-S-H precipitation rates during hydration.
The C3S - water interface is investigated in this work by atom probe tomography (APT), an imaging technique with three-dimensional nanoscale resolution and chemical identification. In order to obtain samples suitable for APT, a method to synthesize large monocrystalline C3S grains is presented. The synthesis is conducted in an optical floating zone furnace by annealing polycrystalline rods at temperatures just below the melting point of C3S. Large monocrystalline grains (>500 µm) of monoclinic and triclinic polymorphs of C3S could be synthesized. The atom probe tomography experiments conducted with the thus produced samples demonstrate that it is possible to measure tricalcium silicate with this method by carefully adjusting the measurement parameters. Furthermore it could be shown that the sample preparation and measurement conditions employed are harmful to the hydrate phase C-S-H and thus also to potential metastable reaction products forming at the C3S - water interface. These harmful conditions might be avoided by applying a novel sample preparation procedure at cryo conditions.
The presented comprehensive dataset contains data for the first 24 hours of hydration of triclinic and monoclinc C3S samples at different water to solid ratios. The measured parameters include XRD and NMR phase contents, pore solution concentrations, specific surface areas, and SEM images at various time steps. With this dataset, it is possible to calculate theoretical C3S dissolution and C-S-H precipitation rates by combination with interfacial dissolution and precipitation rates determined separately. The results show a good fit between the theoretical C-S-H precipitation rates and the actual reaction rates measured for both C3S polymorphs and all investigated water to solid ratios indicating that the applied calculation model incorporates all relevant factors to describe C-S-H precipitation kinetics during C3S hydration. The theoretical C3S dissolution rates in contrast do not fit the actual reaction rates in all investigated systems. This demonstrates that there are important factors missing in the applied calculation model for C3S dissolution kinetics.
},
author = {Naber, Christoph},
faupublication = {yes},
keywords = {Calcium-Silicate-Hydrate (C-S-H); Cement; Hydration; Kinetics; Tricalcium silicate},
month = {Jan},
peerreviewed = {automatic},
school = {Friedrich-Alexander-Universität Erlangen-Nürnberg},
title = {{Hydration} kinetics of tricalcium silicate: {A} dataset for reaction rate calculations and nanoscale analysis employing atom probe tomography},
url = {https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10335},
year = {2019}
}
@article{faucris.206192769,
abstract = {Calcium phosphate cements composed of β-tricalcium phosphate (β-TCP) and phosphoric acid were modified by addition of 5, 10, 12.5, 15 and 20 wt% phytic acid (IP6) related to the β-TCP content and compared to a reference containing 0.5 M citric acid monohydrate solution as setting regulator. The hydration reaction of these cements was investigated by isothermal calorimetry and in-situ X-ray diffraction at 23 °C and 37 °C. The cements were further characterized with respect to their injectability, rheology, zeta potential and time-resolved compressive strength development.Injectability was strongly improved by IP6 addition, while the maximum effect was already reached by the addition of 5 wt% IP6. This could be clearly related to an increase of the negative zeta potential leading to a mutual repulsion of cement particles. A further increase of the IP6 content had a detrimental effect on initial paste viscosity and shifted the gelation point to earlier time points. IP6 was further proven to act as a retarder for the cement setting reaction, whereas the effect was stronger for higher IP6 concentrations. Additionally, IP6 favoured the formation of monetite instead of brushite and a better mechanical performance compared to the IP6 free reference cemen},
author = {Hurle, Katrin and Weichhold, Jan and Brueckner, Manuel and Gbureck, Uwe and Brueckner, Theresa and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.actbio.2018.09.002},
faupublication = {yes},
journal = {Acta Biomaterialia},
keywords = {Calcium phosphate cement; Phytic acid; Rheology; In-situ XRD; Injectability},
pages = {378-389},
peerreviewed = {Yes},
title = {{Hydration} mechanism of a calcium phosphate cement modified with phytic acid},
volume = {80},
year = {2018}
}
@article{faucris.106424604,
abstract = {Calcium phosphate cements (CPCs) are applied as bone cements due to their excellent biocompatibility. In the present study, the quantitative phase content development during hydration of partially amorphized β-tricalcium phosphate (β-TCP) within the first 24 h was investigated by in-situ X-ray diffraction (XRD) combined with the G-factor method, an external standard method. The quantity of amorphous phase (ATCP) in the powders was determined by the G-factor method.
The hydration model established for partially amorphized β-TCP indicates that ATCP reacted first, followed by the hydration of a small fraction of crystalline β-TCP starting after some h. Consequently, hydration resulted in biphasic samples composed of calcium deficient hydroxyapatite (CDHA) and crystalline β-TCP. The ratio wt%(CDHA)/wt%(β-TCP) after 24 h hydration was adjustable by the initial ATCP content. The crystallinity of CDHA was nearly independent of the ATCP content. Since the biological degradability of CDHA and β-TCP differ, the degradation performance of the set cements is expected to be adjustable by varying the ATCP content. The present study provided a basic understanding of the hydration mechanism of partially amorphized β-TCP, which is the prerequisite for the development of applicable CPC formulations.
2AH8 are determined: (a) transformation to C3AH6 + AH3 in the presence of sufficient free water and (b) dehydration to C2AH5 at a lack of free water. Moreover, the influence of precuring of the pastes at 23°C before heating to 60°C is investigated. The increasing loss of free water with increasing precuring time resulting from both, precipitation of hydrate phases and evaporation, causes incomplete hydration of CA or CA2 as well as dehydration of C2AH8 instead of conversion into C3AH6. Comparative investigations of sealed samples always revealed complete hydration of CA and CA2 as well as complete conversion of C2AH8.
tobermorite. All synthesized samples were investigated by means of powder XRD combined with Rietveld refinement.
Al-substituted 11 Å tobermorite was successfully synthesized on the basis of a broad range of compounds
characterized by a varying content of metakaolin. Katoite was present depending on the amount of
supplied Al3+, which was determined by the dosage of metakaolin. Minor crystalline components included in the
two types of metakaolin sources varied greatly in their reactivity under hydrothermal conditions. Despite a
different degree of purity, the two types of metakaolin showed corresponding effects at moderate dosages but
contrary effects at higher dosages as for the synthesis of 11 Å tobermorite. The domain morphology of tobermorite
could be associated with Al3+ incorporation for low dosages of metakaolin represented by up to 2 wt.-
% Al2O3 in the dry mix. By contrast, Al3+ affected tobermorite lattice parameters at equivalent and even at
higher dosages with c reaching 22.95 Å at 12 wt.-% Al2O3 in the dry mix.
C3S and one Al-doped C3S (0.5 wt.-% Al2O3). We added differently concentrated KOH solutions representing
alkalis in the pore solution, which lead to an increase of the interfacial precipitation rates of C-S-H during the
hydration of C3S compared to the hydration without KOH. Isothermal calorimetry was conducted for the
determination of the rates of reaction during the hydration process and ICP-OES measurements for the determination
of the pore solution composition at certain times of hydration. The increasing effect of KOH solution on
the calculated interfacial precipitation rates from pore solution data can explain the enhancement of the rates of
reaction recorded by heat flow calorimetry during the early hydration. Therefore, the interfacial precipitation
rates of C-S-H can accurately describe the acceleration effect of alkalis on the early hydration of C3S.
3(PO 4) 2 on the transformation temperature of β-tricalcium phosphate (β-TCP) to α-tricalcium phosphate (α-TCP) was examined. A maximum substitution by 14 mol% of Mg 2+ on Ca 2+ sites in the β-TCP structure was determined for powders calcinated at 1025±10°C. X-ray powder diffraction analysis (XRPD) in combination with Rietveld method (TOPAS 2.1) was employed for quantitative phase analysis and structural refinement. The synthesized and characterized Mg-doped samples were sintered in air atmosphere in a vertical tube furnace at suitable temperatures ranging from 1460 to 1680°C and subsequently quenched to room temperature, in order to stabilize α-TCP. The β to α transformation temperatures were determined by differential temperature analysis and XRPD analysis. © 2004 Elsevier Ltd. All rights reserved.},
author = {Enderle, Ralph and Götz-Neunhoeffer, Friedlinde and Göbbels, Matthias and Müller, Frank and Greil, Peter},
doi = {10.1016/j.biomaterials.2004.09.017},
faupublication = {yes},
journal = {Biomaterials},
keywords = {α-TCP; β-TCP; Mg substitution; Rietveld refinement; Transformation temperature; Phase transformation temperature; Rietveld method; Room temperature; Structural refinement},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.influe},
pages = {3379-3384},
peerreviewed = {unknown},
title = {{Influence} of magnesium doping on the phase transformation temperature of {Beta}-{TCP} ceramics examined by {Rietveld} refinement},
volume = {Vol. 26},
year = {2005}
}
@article{faucris.117337044,
abstract = {nvestigations into the influence of various polyvinyl alcohols (PVOH) on the hydration of Portland cement have shown that the alumina reaction is affected during the cement hydration. It was found that the dissolving of the sulfate carrier and of the C3A is retarded by the presence of polyvinyl alcohols and also that the ettringite formation is accelerated after about 16 hours hydration.These results were obtained with 3 different polyvinyl alcohols.},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hergeth, Wolf Dieter and Härzschel, Reinhard},
faupublication = {yes},
journal = {Zkg International},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.influe},
pages = {100-107},
peerreviewed = {Yes},
title = {{Influence} of polyvinyl alcohol on phase development during the hydration of {Portland} cement},
year = {2010}
}
@inproceedings{faucris.121716144,
abstract = {
Investigations into the influence of various polyvinyl alcohols (PVOH) on the hydration of Portland cement have shown
that the alumina reaction is affected during the cement hydration. It was found that the dissolving of the sulfate carrier and of the
C
3
A is retarded by the presence of polyvinyl alcohols and also that the ettringite formation is accelerated after about 16 hours hydra
-
tion. These results were obtained with 3 different polyvinyl alcohols.
},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hergeth, Wolf Dieter and Härzschel, Reinhard},
booktitle = {17. Internationale Baustofftagung - Tagungsbericht},
date = {2009-09-23/2009-09-26},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2009.nat.dgeo.IGM.LM.influe},
pages = {643-648},
peerreviewed = {unknown},
title = {{Influence} of {Polyvinyl} {Alcohol} ({PVA}) on quantitative phase development during early cement hydration},
venue = {Weimar},
volume = {1},
year = {2009}
}
@article{faucris.118494244,
abstract = {Hydration of partially amorphized α-TCP powders with Sr concentrations ranging from 0 to 10 mol% substitution for Ca was analyzed by isothermal calorimetry and quantitative in-situ XRD. Hydration of both crystalline α-TCP and amorphous TCP (ATCP) forming CDHA was retarded to an increasing extent with increasing Sr content. Sr slightly reduced the crystallite size (XRD coherent scattering domains) of the CDHA formed during hydration, while the size of crystals visible under SEM was not noticeably affected. Reaction enthalpies of ΔH = 122 ± 8 J/g and ΔH = 257 ± 8 J/g were determined for the hydration of crystalline α-TCP and ATCP containing 5 mol% Sr substitution for Ca. This is comparable with the corresponding reaction enthalpies previously obtained for undoped samples, which are 106 ± 7 J/g for α-TCP and 250 ± 7 J/g for ATCP.},
author = {Hurle, Katrin and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1111/jace.14005},
faupublication = {yes},
journal = {Journal of the American Ceramic Society},
keywords = {Coherent scattering; Crystalline materials; Crystallite size; Enthalpy; Hydration; Calcium deficient hydroxyapatite; In-situ XRD; Isothermal calorimetry; Reaction enthalpies; XRD},
pages = {1055-1063},
peerreviewed = {Yes},
title = {{Influence} of {Sr2}+ on {Calcium}-{Deficient} {Hydroxyapatite} {Formation} {Kinetics} and {Morphology} in {Partially} {Amorphized} α-{TCP}},
volume = {99},
year = {2015}
}
@article{faucris.107298444,
abstract = {The hydration of one mechanically activated alite passing through different drying procedures is examined by heat flow calorimetry and quantitative in-situ XRD analysis. The reactivity of the alite powders is strongly affected by the drying technique. It is shown that the reactivity of the amorphous part of the activated alite sample is particularly affected. Due to the fast initial dissolution of the amorphous “alite” part, the hydration progression is speeded up significantly. However, if the hydration is not speeded up by the amorphous “alite” dissolution, as in the case of surface passivation, the heat released until the transition to the deceleration period will increase. It is discussed that a crystalline alite dissolution by etch pit opening could increase the reactive alite surface and therefore increase the reaction degree at the transition to the deceleration period.},
author = {Bergold, Sebastian and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2016.06.007},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Acceleration (A); Ageing (C); Amorphous material (B); Calcium-silicate-hydrate (B); Hydration (A)},
pages = {73-81},
peerreviewed = {Yes},
title = {{Influence} of the reactivity of the amorphous part of mechanically activated alite on its hydration kinetics},
volume = {88},
year = {2016}
}
@article{faucris.123492424,
abstract = {For refractory application inert alumina fillers frequently are mixed with calcium aluminate cements to improve particle packaging and to reduce the demand of water for low-cement castables. This finally results in decreased porosity and higher strength. Investigations by isothermal heat flow calorimetry show that the presence of alumina filler material with high specific surface area leads to a shortening of the induction period of calcium aluminate cement hydration. The study also demonstrates that the specific surface area of the chosen alumina filler changes the starting point of the main hydration reaction and in consequence the setting time of the calcium aluminate cement mixture is strongly influenced. During the dormant period the heat flow of calcium aluminate cement hydration with coarse alumina filler material of lower specific surface area is characterised by negative values. By addition of filler with higher specific surface area, the surface available for heterogeneous nucleation can be increased. Owing to more available surfaces the critical energy barrier for stable nuclei formation can be reduced. This results in a positive heat flow during the dormant period and a shift of the main reaction to earlier points in time.},
author = {Klaus, Sebastian and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1680/jadcr.15.00012},
faupublication = {yes},
journal = {Advances in Cement Research},
keywords = {CRYSTAL STRUCTURE; CEMENT; ADMIXTURES},
month = {Jan},
pages = {62-70},
peerreviewed = {Yes},
title = {{Influence} of the specific surface area of alumina fillers on {CAC} hydration kinetics},
volume = {28},
year = {2016}
}
@article{faucris.237938699,
abstract = {The first 24 h of hydration of tricalcium silicate (C3S) have been studied at varying water/solid (w/s) mass ratios ranging from 0.5 to 10. Gathered data comprise the reaction degree, pore solution concentrations and specific surface area evolution. Combined with interfacial C3S dissolution rates and C-S-H precipitation rates found in the literature, these data are used to calculate theoretical reaction rates from C-S-H precipitation and C3S dissolution. Compared with the measured reaction rates, theoretical rates calculated from C-S-H precipitation show a good match, indicating a correct kinetic description of C-S-H precipitation. Theoretical rates calculated from C3S dissolution are higher than expected during the first hours of hydration which could be explained by the buildup of a metastable hydrate phase barrier. Furthermore, a comparison of the reaction rates shows no effect of the w/s ratio. The Ca concentration evolution indicates a delay of the first portlandite precipitation with increasing w/s ratio.},
author = {Naber, Christoph and Bellmann, F. and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2020.106087},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ca; Calcium-silicate-hydrate (C-S-H) (B); Hydration (A); Kinetics (A); Pore solution (B)},
note = {CRIS-Team Scopus Importer:2020-05-02},
peerreviewed = {Yes},
title = {{Influence} of w/s ratio on alite dissolution and {C}-{S}-{H} precipitation rates during hydration},
volume = {134},
year = {2020}
}
@article{faucris.121510884,
abstract = {An in situ framework for H time-domain nuclear magnetic resonance analysis was developed and applied on alite and OPC hydration. Highly time-resolved quantitative data on the evolution of proton reservoirs during hydration was collected for up to 40 h. Reservoirs could be clearly assigned to mobile (mix water), intermediate (C-S-H) and rigid fractions (CH, ettringite). Comparison of determined fraction quantities with data from in situ XRD measurements and heat flow calorimetry show very good agreement. During alite hydration at 23°C, a bulk water content of 4 HO in CSH was confirmed. T2 relaxation times of the mobile fraction shifted towards shorter times from the start of the main reaction until the maximum of the heat flow. Microstructure evolution is nearly finished at that point in time. T2 relaxation times are severely shortened for iron-containing OPC, but are still evaluable.},
author = {Ectors, Dominique and Götz-Neunhoeffer, Friedlinde and Hergeth, Wolf Dieter and Dietrich, Ulf and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2015.10.011},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ca3SiO5; Calcium-silicate-hydrate (C-S-H); Cement; Hydration; Kinetics},
month = {Jan},
pages = {366-372},
peerreviewed = {Yes},
title = {{In} situ {1H}-{TD}-{NMR}: {Quantification} and microstructure development during the early hydration of alite and {OPC}},
volume = {79},
year = {2016}
}
@article{faucris.221128970,
abstract = {In situ chalcophile and siderophile major and trace elements were analyzed in sulfides from eight Moroccan Middle Atlas lherzolite xenoliths using electron microprobe and laser ablation inductively coupled plasma mass spectrometry. The sulfides occur enclosed in primary silicates, interstitial in the peridotite matrix, and associated with glass-bearing melt pockets. Monosulfide solid solutions are enriched in these xenoliths relative to pentlandite and intermediate solid solutions. Regardless of the textural occurrence, sulfide platinum-group element (PGE) patterns are distinguished into residual ([Pd/Ir]N < 1 and [Pt/Pd]N > 1 or [Pt/Pd]N < 1), melt-like ([Pd/Ir]N > 1), and unfractionated patterns. The coexistence of both residual and melt-like PGE signatures on a cm scale in a single sample implies that sulfides may record initial depletion and subsequent re-enrichment more effectively than constituent silicates do. Chalcophile and siderophile trace elements other than the PGEs are fractionated between the precipitated sulfide phases, but do not vary systematically with the PGE signatures, suggesting that the PGEs are comparatively sensitive to melting and depletion. In addition, Fe-rich hydroxides generated by sulfide breakdown due to atmospheric weathering display PGE systematics almost identical to their precursor sulfides, implying that they may be reliable tracers of mantle processes even after extensive weathering.},
author = {Westner, Katrin and Beier, Christoph and Klemd, Reiner and Osbahr, Inga and Brooks, Nadine},
doi = {10.3390/min9050276},
faupublication = {yes},
journal = {Minerals},
keywords = {Metasomatism; Middle atlas; Platinum-group elements; Subcontinental lithospheric mantle; Sulfides; Xenoliths},
note = {CRIS-Team Scopus Importer:2019-06-21},
peerreviewed = {Yes},
title = {{In} situ chalcophile and siderophile element behavior in sulfides from moroccan middle atlas spinel peridotite xenoliths during metasomatism and weathering},
volume = {9},
year = {2019}
}
@article{faucris.282831082,
abstract = {In-situ X-ray diffraction (XRD) is a powerful tool to assess the hydration of cementitious materials, providing time-resolved quantitative analysis with reasonable accuracy without disturbing sample. However, the lack of guidelines and well-established procedures for data collection and analysis is the limiting factor for spreading this technique. This paper discussed using in-situ laboratory XRD to assess cement hydration. The first part was dedicated to a literature review on the topic. Then, experimental strategies were discussed, and recommendations related to the data analysis routine were drawn; the advantages and limitations of this technique were also discussed. We can conclude that the critical factors for a successful analysis are the choice of an adequate experimental setup with good statistics and low measurement time, the proper consideration of different amorphous contributions in the XRD pattern, and a good data analysis routine. Independent techniques are highly recommended to support the in-situ XRD data.},
author = {de Matos, Paulo R. and Andrade Neto, José S. and Jansen, Daniel and De la Torre, Angeles G. and Kirchheim, Ana Paula and Campos, Carlos E.M.},
doi = {10.1016/j.cemconres.2022.106988},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Cement; Hydration; In-situ XRD; Laboratory XRD; X-ray diffraction},
note = {CRIS-Team Scopus Importer:2022-10-07},
peerreviewed = {Yes},
title = {{In}-situ laboratory {X}-ray diffraction applied to assess cement hydration},
volume = {162},
year = {2022}
}
@article{faucris.111496484,
author = {Schmid, Markus and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Göbbels, Matthias and Brandes, Marc and Johannes, Hans Hermann and Kowalsky, Wolfgang},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.insitu{\_}9},
pages = {134},
peerreviewed = {Yes},
title = {{In} situ {pH}-{Wert}-{Messungen} {Mischungen} aus {Calciumaluminatzement} mit {Calciumsulfat}},
volume = {17(1)},
year = {2005}
}
@inproceedings{faucris.118079324,
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Schmitt, Dirk and Degenkolb, Matthias and Holland, Uwe},
booktitle = {Tagungsbericht der 16. Internationalen Baustofftagung ibausil},
date = {2006-09-20/2006-09-23},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2006.nat.dgeo.IGM.LM.insitu},
pages = {375-382},
peerreviewed = {unknown},
title = {{In}-situ {Untersuchung} der frühen {PZ}-{Hydratation}},
venue = {Weimar},
volume = {1},
year = {2006}
}
@incollection{faucris.116099984,
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Schmitt, Dirk and Degenkolb, Matthias and Holland, Uwe},
booktitle = {GDCh-Monographien},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-27-3},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LM.insitu},
pages = {40-49},
peerreviewed = {unknown},
title = {{In} situ {Untersuchungen} phasenspezifischer und mikrostruktureller {Eigenschaften} von {Portlandzementen}},
volume = {31},
year = {2004}
}
@article{faucris.118308564,
abstract = {Since polymers are known to be responsible for the emergence of important properties and the microstructure in mortar systems, our focus was on the influence of the polymer PDADAC on cement hydration. The examinations were focused specifically on the formation of the phase ettringite which is generated during the hydration of Ordinary Portland Cement (OPC). The investigations of the formation of ettringite in the presence of PDAMAC were carried out by means of X-ray diffraction analysis in combination with Rietveld refinement. During hydration of OPC in the presence of low PDADMAC concentrations no significant changes of the ettringite lattice parameters could be determined. After synthesis of pure ettringites only a very small increase of the lattice parameter a occurs, likely due to chloride incorporation. © by Oldenbourg Wissenschaftsverlag, München.},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hergeth, Wolf Dieter and Härzschel, Reinhard},
doi = {10.1524/zksu.2009.0053},
faupublication = {yes},
journal = {Zeitschrift für Kristallographie, Supplement},
keywords = {Ettringite; Lattice parameters; OPC; PDADMAC},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.insitu{\_}2},
pages = {359-364},
peerreviewed = {unknown},
title = {{In}-situ {XRD} investigation of the influence of {PDADMAC} on ettringite formation in cement systems},
volume = {Suppl. 30},
year = {2009}
}
@article{faucris.239807381,
abstract = {In the present work the hydration of white CAC, inert alumina-filler and CaCO3 was investigated at different temperatures with in-situ XRD. Experiments were performed at 10 °C, 23 °C, 40 °C and 60 °C. Overcoming or mitigating the phenomena of calcium aluminate hydrate conversion by adding reactive additives to calcium aluminate cement is often described in literature. When a sufficient amount of calcite is added, carbonate-AFm (monocarbonate and hemicarbonate) is expected to be the dominant hydrate phase. Calcite however, acts as an inert filler and barely influences the calcium aluminate hydration products at 10 °C. With rising temperature monocarbonate contents increase as well as the reaction rate of cement phases. At 60 °C minor amounts of C3AH6 precipitate during the early hydration. Special attention is given to the role of CAH10 and C2AHx during hydration. While CAH10 is dominant at 10 °C, C2AHx precipitates in a temperature range between 23 and 60 °C as a precursor phase for carbonate-AFm phases. These are not found at 10 °C, which is probably due to the lack of the precursor phase (C2AHx). The hydration of the mix at 10 °C with an initial addition of C2AHx shows that carbonate-AFm-phases can be precipitated in addition to CAH10 during the first 96 h.},
author = {Goergens, Julian and Manninger, Tanja and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2020.106160},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcite (D); Calcium aluminate cement (D); Hydration (A); X-ray diffraction (B)},
note = {CRIS-Team Scopus Importer:2020-06-30},
peerreviewed = {Yes},
title = {{In}-situ {XRD} study of the temperature-dependent early hydration of calcium aluminate cement in a mix with calcite},
volume = {136},
year = {2020}
}
@article{faucris.109121144,
abstract = {Synthetic cement with different sulfate additions is investigated by means of heat flow calorimetry and quantitative in-situ XRD. This study especially analyses different sulfate additions between a typical undersulfated and a properly sulfated white Portland cement. A series of sulfate additions was monitored, and the interference of aluminate and silicate reaction was observed. This interference has never received closer examination before. It is shown that while interference occurs at different times during hydration, the reaction turnover of all synthetic cements is the same after 48 h. The results indicate that negative effects on silicate hydration are likely due to the precipitation of AFm phases and not an Al-inhibition process. The accelerating effect of sulfate on alite hydration is most likely caused by a seeding effect of the very fine ettringite that has just precipitated, resulting in more substrate surface for C-S-H precipitation in comparison to pure alite paste. © 2017 Elsevier L},
author = {Bergold, Sebastian and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2016.12.006},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ca3SiO5 (D); Calorimetry (A); Hydration (A); Kinetics (A); X-ray diffraction (B)},
pages = {32-44},
peerreviewed = {Yes},
title = {{Interaction} of silicate and aluminate reaction in a synthetic cement system: {Implications} for the process of alite hydration},
volume = {93},
year = {2017}
}
@article{faucris.209004001,
author = {Schmädicke, Esther and et al.},
author_hint = {Müller W., Schmädicke E., Okrusch M., Schüssler U.},
doi = {10.1127/0935-1221/2003/0015-0295},
faupublication = {yes},
journal = {European Journal of Mineralogy},
keywords = {Anthophyllite; Amphibole-chlorite-talc intergrowths; Chain arrangement faults; Ca-amphibole; Cummingtonite; Chain multiplicity faults; Orientation relationships; Gedrite exsolutions; TEM},
pages = {295-307},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Intergrowths} between anthophyllite, gedrite, calcic amphibole, cummingtonite, talc and chlorite in a metamorphosed ultramafic rock of the {KTB} pilot hole, {Bavaria}},
volume = {15},
year = {2003}
}
@book{faucris.310822506,
abstract = {This textbook teaches important material and technological fundamentals in various technical systems and applied geoscientific fields. Beginning with the mineralogical characteristics of selected non-metallic raw materials and industrial minerals, this book presents the connections between properties and industrial applications and discusses the environment-relevant aspects as well as problems of biomineralogy. An introduction is given to important mineralogical and physico-chemical aspects of ceramic materials such as silicate ceramics, glass, cement, refractory materials as well as an overview about material synthesis.
This makes it the first textbook to present the fundamentals of applied mineralogy as a material-related geoscience in a compact form and to show important bridges to industrial issues and approaches to solutions. It is aimed primarily at undergraduate students of geosciences and materials science, but is also suitable for related disciplines and practical application},
author = {Goetze, Jens and Göbbels, Matthias},
doi = {10.1007/978-3-662-64867-4},
faupublication = {yes},
isbn = {9783662648667},
keywords = {Mineralogy; Mineral Synthesis; Environmental Mineralogy; Silicate Materials; Non-metallic raw Materials; Biomineralogy; Energy Technology; Rock Quartzite; Refractory Material; High Quartz; Limestone; Metallurgy; Pegmatite; Vulcanite},
peerreviewed = {unknown},
title = {{Introduction} to {Applied} {Mineralogy}},
year = {2023}
}
@article{faucris.308211795,
abstract = {The efficiency of 3D concrete printing significantly depends on the mortar performance, which can be improved and controlled by adding a shotcrete accelerator. This targeted control is implemented by adding a small accelerator dose to an injection nozzle before extrusion. In this article, a study is conducted on the suitability of the material for this application. For this purpose, a shotcrete accelerated printable mortar is investigated. Comparing physical and physicochemical results leads to an in-depth understanding of the chemical processes and their effects on physical behaviour, which enables a positive assessment of the accelerator for 3D concrete printing injection method.},
author = {Pott, Ursula and Jakob, Cordula and Dorn, Tobias and Stephan, Dietmar},
doi = {10.1016/j.cemconres.2023.107264},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {3D concrete printing injection method; Cement hydration; Physical material behaviour; Shotcrete accelerator; Suitability study},
note = {CRIS-Team Scopus Importer:2023-07-28},
peerreviewed = {Yes},
title = {{Investigation} of a shotcrete accelerator for targeted control of material properties for {3D} concrete printing injection method},
volume = {173},
year = {2023}
}
@incollection{faucris.111058684,
address = {Durban},
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Ingrid, Lindner},
booktitle = {Proceedings of the 11th International Congress on the Chemistry of Cement},
editor = {Grieves &Owens},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.invest{\_}8},
pages = {695-704},
peerreviewed = {unknown},
title = {{Investigation} of hydration behavior of {Ferrite} phase {C{\_}6{\_}A{\_}x{\_}F{\_}3}-x{\_} with different {Al}^3+^-content in mixes with {C{\_}3{\_}A} and {Gypsum} using a revised highly efficient isothermal calorimeter},
year = {2003}
}
@article{faucris.111780064,
abstract = {
Tricalcium phosphate Ca3(PO4)2 (TCP), an osteoconductive as well as bioresorbable phase, has found application as bone cement and bone implant material. TCP was found to crystallize in three polymorphic modifications: β-TCP below 1180°C, α-TCP between 1180°C and 1430°C, and α-TCP above 1430°C [1]. It is mainly β-TCP and α-TCP that have gained acceptance in biomedical applications. At the moment β-TCP ceramics are used for non-load-bearing applications in oral surgery. In this investigation we were able to detect an additional but reversible phase transformation from β- to β′-TCP at 1000°C. The influence of partial Mg2+ substitution of Ca 2+ in the solid solution series of β′-TCP (Ca 1-xMgx)3(PO4)2 was determined at 1025°C ± 10°C in air. The temperatures for β′- to α-TCP phase transformation were investigated in a manner differentiated according to the different Mg2+ contents.
},
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Enderle, Ralph and Göbbels, Matthias},
faupublication = {yes},
journal = {Zeitschrift für Kristallographie, Supplement},
keywords = {Polymorphic modifications; Rietveld refinement; Solid solution; Tricalcium phosphate (TCP); X-ray powder diffraction},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LM.invest},
pages = {375-380},
peerreviewed = {unknown},
title = {{Investigation} of the beta'- to alpha-phase transformation temperature of ({Ca1}-{xMgx})3({PO4})2 solid solutions},
volume = {2},
year = {2007}
}
@incollection{faucris.228152758,
abstract = {To gain more information about the relationship between early cement hydration and rheological behavior of the corresponding cement paste, a new penetration test device, with the name “Multipurpose Incremental Loading device” (MILD), has been developed. The construction and the mechanical properties of the device are described in detail. Furthermore, the implementation of a measurement and first results will be discussed, and the new device is compared with the standardized Vicat test. In addition, a comparison of the measurement results with rheological investigations is made and the results of quantitative in-situ XRD and calorimetry are integrated for a deeper understanding. We show that it is possible to get more information about the structure formation with the new device than with the Vicat test. Moreover, a comparison with the rheological properties of a cement paste was done. Both methods show two periods with different rheological behavior. During the first two hours the paste shows a slow increase of viscosity which is followed by a strong increase. The results of the penetration test and the rheometer are linked with the formation of hydration products and the heat flow development. This comparison shows that the link between the two periods is the beginning of the acceleration period. Finally, it is concluded that it is possible to get precise information about the early cement hydration with a penetration test.},
author = {Pott, Ursula and Ehm, Clemens and Jakob, Cordula and Stephan, Dietmar},
booktitle = {Rheology and Processing of Construction Materials},
doi = {10.1007/978-3-030-22566-7{\_}29},
editor = {Viktor Mechtcherine, Kamal Khayat, Egor Secrieru},
faupublication = {yes},
keywords = {Early cement hydration; Penetration test; Phase formation; Rheology},
note = {CRIS-Team Scopus Importer:2019-10-22},
pages = {246-255},
peerreviewed = {unknown},
publisher = {Springer Netherlands},
series = {RILEM Bookseries},
title = {{Investigation} of the {Early} {Cement} {Hydration} with a {New} {Penetration} {Test}, {Rheometry} and {In}-{Situ} {XRD}},
volume = {23},
year = {2020}
}
@article{faucris.236513663,
abstract = {The rheological behavior of cement paste and the improvement of its flowability takes center stage in many research projects. An improved flowability can be achieved by the addition of superplasticizers (SP), such as polycarboxylate ethers (PCE). In order to be able to use these PCEs effectively and in a variety of ways and to make them resistant to changes in the environment, it is crucial to understand the influence of SPs on cement hydration. For that reason, the topic of this paper was the incompatibility of a specific SP and an ordinary Portland cement (OPC). The incompatible behavior was analyzed using rheological tests, such as the spread flow test and penetration test, and the behavior was compared by means of an ultrasound technique and explained by the phase content measured by in-situ X-ray diffraction (XRD) the heat evolution measured by calorimetry, and scanning electron microscope (SEM) images. We showed that the addition of the SP in a high dosage led to a prevention of the passivation of the most reactive and aluminum-containing clinker phases, aluminate and brownmillerite. This induced the aluminate reaction to take place in the initial period and led to an immediate stiffening of the cement paste and, therefore, to the complete loss of workability. The results showed that in addition to the ettringite, which began to form directly after water addition, hemicarbonate precipitated. The fast stiffening of the paste could be prevented by delayed addition of the SP or by additional gypsum. This fast stiffening was not desirable for SPs, but in other fields, for example, 3D printing, this undesirable interaction could be used to improve the properties of printable mortar.},
author = {Pott, Ursula and Jakob, Cordula and Jansen, Daniel and Neubauer, Jürgen and Stephan, Dietmar},
doi = {10.3390/ma13040977},
faupublication = {yes},
journal = {Materials},
keywords = {Calorimetry; Hydration; In-situ XRD; Incompatibility of superplasticizer; Penetration; Rheology; SEM; Spread flow test; Ultrasound},
note = {CRIS-Team Scopus Importer:2020-03-27},
peerreviewed = {Yes},
title = {{Investigation} of the incompatibilities of cement and superplasticizers and their influence on the rheological behavior},
volume = {13},
year = {2020}
}
@inproceedings{faucris.121692164,
author = {Götz-Neunhoeffer, Friedlinde and Göbbels, Matthias and Enderle, Ralph},
booktitle = {Proc. of the 19th General Meeting of the IMA},
date = {2006-07-23/2006-07-28},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2006.nat.dgeo.IGM.LM.invest},
pages = {271},
peerreviewed = {unknown},
publisher = {IMA},
title = {{Investigation} of the ß-alpha {TCP} phase transformation in dependence of {Mg}-content},
venue = {Kobe, Japan},
year = {2006}
}
@article{faucris.110502964,
abstract = {Brownmillerite (commonly C4AF) was synthesized in a laboratory furnace. The product was examined by X-ray powder diffraction and the structure was refined by the Rietveld method. Further syntheses were made under various conditions by substituting Fe2O3 by MgO + SiO2 according to the formula C4AF1-xMxSx. All samples were examined by X-ray diffraction and quantified by Rietveld method due to their content of Brownmillerite, C2S and MgO. All results show that the whole SiO2 content could be calculated as C2S. MgO could be partially found as periclase. Brownmillerite shows a shift of lattice parameters according to the solid solution series C6A2F - C2F.},
author = {Neubauer, Jürgen and Kuzel, Hans Jürgen and Sieber, Roland and Ecker, Michael},
doi = {10.1016/0008-8846(95)00178-6},
faupublication = {yes},
journal = {Cement and Concrete Research},
month = {Jan},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.invest},
pages = {77-82},
peerreviewed = {Yes},
title = {{Investigations} on introducing {Si} and {Mg} into {Brownmillerite} - {A} {Rietveld} {Refinement}},
volume = {26},
year = {1996}
}
@article{faucris.110503844,
abstract = {Immobilisation and solidification of pollutants can be achieved by adding cement to the waste products or by mixing adequate proportions of industrial waste products as flue gas desulfurization products, fly-ashes, contaminated sludges etc. The resulting stabilised product of this treatment is containing different reservoir minerals intimately intergrown with non reactive material. The solidified waste containing the immobilised pollutants itself can be used as an "Inner Barrier System" [1] of a waste dump. For this application the solidification products have to be stable under the physico-chemical conditions in a waste dump. In this study the long-term behaviour of the formed reservoir minerals of the AFm-type (Al2O3-Fe2O3-monophases) was evaluated by X-ray investigations at higher temperatures.},
author = {Götz-Neunhoeffer, Friedlinde and Pöllmann, Herbert},
faupublication = {yes},
journal = {Materials Science Forum},
keywords = {AFm Phases; Halogenides; Immobilisation; Lamellar Calcium Ferrate Hydrates; Reservoir Minerals; X-Ray Diffraction at Higher Temperatures},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.invest{\_}0},
pages = {615-620},
peerreviewed = {Yes},
title = {{Investigations} on {Stability} and {Long}-term {Behaviour} of {AFm} {Phases} at {Higher} {Temperatures} by {Powder} {Diffraction} {Methods}},
year = {1996}
}
@article{faucris.307668651,
abstract = {In this work, we investigated the influence of alkalis on C-S-H precipitation and growth rates in solutions supersaturated
with respect to C-S-H. Therefore, we used an experimental setup that leads to C-S-H precipitation
and growth in solutions with a known KOH concentration. The results show that the KOH concentration in
solution generally leads to an increase of the C-S-H growth rates at lower supersaturation levels. Based on these
findings, we calculated theoretical reaction rates of C3S hydration using the precipitation rates of C-S-H. The
comparison between these calculated rates and measured reaction rates from hydration experiments shows good
agreement, allowing us to present a quantitative model for the effect of alkalis in combination with aluminum.
Furthermore, we provide a quantitative analysis of how alkalis and aluminum modify reaction rates during the
acceleration period of C3S hydration, which can be explained by different behaviors in the nucleation and growth
of C-S-H.
300 °C) and lose their magnetizability upon transition from magnetite/maghemite (γ-Fe2O3 / Fe3O4) to hematite (α-Fe2O3). Silica (SiO2) shells can effectively prevent this undesired effect up to ≈1000 °C. Herein, the study shows how to utilize SPIONs with varying SiO2 shell thickness and thus, different oxidation susceptibility, and how to combine them in micrometers sized assemblies – so-called supraparticles (SPs), to create a structurally emerging magnetic temperature recording functionality. The desired oxidation of non or weakly-protected SPIONs within SPs upon temperature events reduces dipole–dipole interactions of well-protected SPIONs in the confined SP entity. The resulting change of magnetic interactions therefore contains information on the thermal history of the SP, which can be spectrally read out via magnetic particle spectroscopy within seconds. Their working range can be tuned from 400 to 1000 °C on two independent structural hierarchy levels, namely the SiO2 shell thickness and the freely selectable ratios of different building blocks in the SP. The application of such SPs as particulate additives for magnetic recording of high-temperature events, especially relevant in metal, alloy, and ceramic processing, representing a yet unexplored and optically-independent option for bulk temperature recording is proposed.
3) system (1-x)PbTiO3-xBiScO3 has been revealed through analyzing room-temperature x-ray pair distribution functions and temperature-dependent Raman scattering data for compositions ranging across the morphotropic phase boundary (MPB). Raman scattering data have provided exclusive evidence for distinct dynamical responses from the A-site Pb/Bi and the B-site Ti/Sc cations as a function of composition and temperature. Both pair distribution function and Raman scattering analyses indicate improved coherence between the A-site and B-site off-center displacements for x above the MPB composition. The distinguishable dynamical features were spotted between two sets of compositional range from which x=0.34 could be assigned as a critical composition of "local" MPB: the composition at which the pathway of mesoscopic-scale temperature-driven coupling and transformation processes changes. This differs from the previous reports based on the analysis of the average structure, suggesting the response function of a system may not necessarily follow the evolution of the average structure from which however the MPB has so far been ascribed for a particular system. The individual features of the cations revealed here will further help in understanding the structure-property correlations for similar ferroelectric solid solutions.},
author = {Datta, Kaustuv and Richter, Andreas and Göbbels, Matthias and Neder, Reinhard and Mihailova, Boriana},
doi = {10.1103/PhysRevB.92.024107},
faupublication = {yes},
journal = {Physical Review B - Condensed Matter and Materials Physics},
peerreviewed = {unknown},
title = {{Mesoscopic}-scale structure and dynamics near the morphotropic phase boundary of (1-x){PbTiO3}-{xBiScO3}},
volume = {92},
year = {2015}
}
@article{faucris.313457095,
abstract = {Anomalies in isotopic abundances of Mo and Ru in solar system matter were found to document variable contributions of the nucleosynthetic s-process component. We report isotopic relations of ϵ 92Mo versus ϵ 100Ru in meteorites from chondritic parent bodies, iron meteorites, and achondrites that reveal deviations from expected s-process abundance variations. We show that two p-process isotopes 92Mo and 94Mo require the presence of distinct p-process components in meteoritic materials. The nucleosynthetic origin of abundant magic (N = 50) p-process nuclides, covering the mass range of Zr, Mo, and Ru, has long been an enigma, but contributions by several recognized pathways, including alpha and νp-antineutrino reactions on protons, may account for the observed relatively large solar system abundances. Specific core-collapse supernovae explosive regions may carry proton-rich matter. Since Mo and Ru isotopic records in solar system matter reveal the presence of more than one nucleosynthetic p-process component, these records are expected to be helpful in documenting different explosive synthesis pathways and the implied galactic evolution of p-nuclides.},
author = {Marti, Kurt and Fischer-Gödde, Mario and Proksche, Carina},
doi = {10.3847/1538-4357/acee81},
faupublication = {yes},
journal = {Astrophysical Journal},
note = {CRIS-Team Scopus Importer:2023-11-03},
peerreviewed = {Yes},
title = {{Meteoritic} {Molybdenum} and {Ruthenium} {Isotopic} {Abundances} {Document} {Nucleosynthetic} p-process {Components}},
volume = {956},
year = {2023}
}
@article{faucris.111681724,
abstract = {Due to the wide technical importance of Ettringite (3CaO•Al 2O3•3CaSO4•32H2O) in hydrated cement based systems, four different synthesis methods were applied to get a better overview on how and under what favoring conditions Ettringite can be formed. In the first step different precipitation methods resulting in Ettringite were established. For all methods Al3+ was supplied by aqueous CO2-free solution of Al2(SO4) 3•18H2O. As a source of CaO-supply a clear solution and otherwise a Ca(OH)2-suspension was utilized. Four synthesis routes with and without sucrose were employed. Variation of reaction parameter like temperature, time of reaction, pH-value of synthesis solution and influence of additional Gypsum were investigated. The qualitative phase analysis was performed by X-ray diffraction method (XRD). Morphological aspects of some synthesis products were studied by scanning electron microscopy (SEM). Finally lattice and structural parameter of the Ettringites were determined by refinement of XRD-pattern using the Rietveld-Method. © 2005 Elsevier Ltd. All rights reserved.},
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Schwesig, Peter},
doi = {10.1016/j.cemconres.2004.04.037},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Characterization; Ettringite; SEM; X-ray diffraction},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LM.minera},
pages = {65-70},
peerreviewed = {Yes},
title = {{Mineralogical} characteristics of {Ettringites} synthesized from solutions and suspensions},
volume = {36},
year = {2006}
}
@inproceedings{faucris.120096724,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Schwesig, Peter},
booktitle = {Proceedings of the 24th International Conference on Cement Microscopy},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2002.nat.dgeo.IGM.LM.minera},
pages = {140-152},
peerreviewed = {unknown},
title = {{Mineralogical} features of {Ettringites} synthesized from solutions and suspensions},
venue = {San Diego California},
year = {2002}
}
@article{faucris.110850564,
author = {Schwesig, Peter and Neubauer, Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.minera{\_}8},
pages = {193},
peerreviewed = {Yes},
title = {{Mineralogische} {Charakterisierung} synthetischer {Ettringite}},
year = {2000}
}
@book{faucris.120949884,
abstract = {Zur Klärung der Phasenentwicklung während der Hydratation von Calciumaluminatzement bei 23 °C wurden Röntgenbeugungsaufnahmen von hydratisierenden Pasten ausgewertet. Der Verlauf der Phasenbildung kann damit in situ dokumentiert werden. Die Pasten wurden innerhalb eines Zeitraumes von 24 h in kurzen Abständen wiederholt röntgenbeugungsanalytisch untersucht. Das Ergebnis der quantitativen Phasenanalyse der Calciumaluminatzementpasten in Kombination mit den zeitabhängigen Daten der Wärmeflusskalorimetrie ermöglicht Modelle zur Hydratation von Calciumaluminatzement bei Anwesenheit von Calciumsulfat, Li+ und Weinsäure zu entwickeln.},
address = {Erlangen},
author = {Götz-Neunhoeffer, Friedlinde},
edition = {1},
editor = {Friedlinde Götz-Neunhoeffer},
faupublication = {yes},
isbn = {3-930357-78-X},
note = {UnivIS-Import:2015-04-02:Pub.2006.nat.dgeo.IGM.LM.modell{\_}8},
pages = {247},
peerreviewed = {unknown},
publisher = {Universitätsbund Erlangen-Nürnberg},
series = {Erlanger Forschungen, Reihe B, Naturwissenschaften und Medizin},
title = {{Modelle} zur {Kinetik} der {Hydratation} von {Calciumaluminatzement} mit {Calciumsulfat} aus kristallchemischer und mineralogischer {Sicht}},
volume = {29},
year = {2006}
}
@article{faucris.107153244,
abstract = {This work presents improved analytical methods for both steps of the production process of autoclaved aerated concrete (AAC), the phase development during the hydration before autoclaving and during the autoclaving process itself. The improvement includes new insights into preparation methods of AAC samples for powder diffraction as well as Rietveld refinement strategies. For the first time a new implementation for calculating anisotropic crystal domain sizes is applied to major hydrate phases occurring during AAC production, namely portlandite during the hydration before autoclaving and tobermorite during the autoclaving process. The calculation of anisotropic domain size growth, which can be implemented in the Rietveld environment, is based on crystallographically and geometrically appropriate models. The implementation of calculating anisotropic domain sizes for the Rietveld software TOPAS 5.0 allows a superior Rietveld fit and a more accurate quantification of the phase development. Additionally it enables the tracking of growth mechanism of portlandite during hydration.
10 vol% in Unit 3 to 0 vol% in Unit 1). In all units, the dominating eclogite type is dark-colored with a composition typical of MORB. A subordinate light type is chemically more variable and has higher contents of Mg, Al, Ca, Cr, Ni, and large ion lithophile elements as well as lower Fe, Zr, Y, and rare earth element concentrations than dark eclogite. Light eclogite formation is interpreted by plagioclase accumulation in a MOR magma chamber. No compositional difference is visible between well-preserved eclogite and samples with variable degrees of post-eclogitic overprint. In addition, dark eclogite from all units is compositionally indistinguishable, implying that prograde dehydration reactions did not modify major and trace element concentrations. This conclusion applies to all reactions in the temperature interval between c. 600 °C (peak T in Unit 3) and c. 900 °C (peak T in Unit 1), including prograde breakdown of calcic amphibole, zoisite, paragonite, and phengite. Together with previous studies on dehydration reactions in blueschist and eclogite at <600 °C (Spandler et al., 2003; Spandler et al., 2004), the present results imply that de-volatilization of the basaltic portion of subducting slabs plays only a minor, if any, role for the enrichment of fluid-mobile elements in the mantle wedge. We infer that most, if not all, of the H2O produced by dehydration reactions between 600 and 900 °C is preserved in eclogite due to the pressure-enhanced capability of garnet and omphacite to incorporate structural water. Incorporation of H2O, produced during the final dehydration stage (c. 800 ± 50 °C, 25–30 kbar), in nominally anhydrous minerals may explain why partial melting obviously did not occur in eclogite.},
author = {Schmädicke, Esther and Will, Thomas M.},
doi = {10.1016/j.lithos.2021.105995},
faupublication = {yes},
journal = {Lithos},
keywords = {Eclogite; Element mobility; Erzgebirge; Geochemistry; Mantle wedge; Meta-basalt},
note = {CRIS-Team Scopus Importer:2021-02-05},
peerreviewed = {Yes},
title = {{No} chemical change during high-{T} dehydration and re-hydration reactions: {Constraints} from {Erzgebirge} {HP} and {UHP} eclogite},
volume = {386-387},
year = {2021}
}
@article{faucris.209004980,
author = {Schmädicke, Esther and et al.},
author_hint = {Gose J., Schmädicke E., Markowitz M., Beran A.},
doi = {10.1007/s00710-009-0095-9},
faupublication = {yes},
journal = {Mineralogy and Petrology},
pages = {105-111},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{OH} point defects in olivine from {Pakistan}},
volume = {99},
year = {2010}
}
@article{faucris.209005276,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Gose J., Witt-Eickschen G., Brätz H.},
doi = {10.2138/am.2013.4440},
faupublication = {yes},
journal = {American Mineralogist},
keywords = {Olivine; Nominally anhydrous minerals; Trace elements; Spinel peridotite; Water content},
pages = {1870-1880},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Olivine} from spinel peridotite xenoliths: {Hydroxyl} incorporation and mineral composition},
volume = {98},
year = {2012}
}
@article{faucris.280349501,
abstract = {Objectives: Here we aim to provide a background on X-Ray Diffraction analysis of quartz-like crystal structures with varying amounts of Al3+ and Li+ substitution, existing confusions on their nomenclature and its implications for novel lithium silicate glass-ceramics. Methods: We reviewed the literature dealing with modifications of the quartz crystal structure and their stuffed LiAlSi2O6 derivates, LiAlSi2O6 – SiO2 solid solutions, the terminology of such phases and criteria used to define the structure known as virgilite. Based on this information, we attempted to allocate the quartz-like phases found in CEREC TesseraTM, InitialTM LiSi Block and Amber® Mill in the range of LiAlO2 - SiO2 solid solutions. For this purpose, their lattice parameters obtained from Rietveld refinement were compared with the lattice parameters of members of the corresponding solid solutions with defined SiO2 molar fraction found in the literature. Results: Based on the lattice parameters available for low quartz, high quartz and its stuffed derivatives, including LiAlSi2O6 and the mineral virgilite, a plot of the a- and c-parameters vs. the mol% SiO2 related to LiAlO2 was constructed with the literature data and the data found for the three dental lithium silicates. As per the definitions of virgilite as either LixAlxSi3-xO6, with 0.5 < x < 1 or especially as members of the LiAlSi2O6 – SiO2 solid-solution series with more than 50 mol% LiAlSi2O6, the crystal structures in CEREC TesseraTM, InitialTM LiSi Block and Amber® Mill failed to fall within the ranges of mol% SiO2 confined for virgilite. Significance: Based on available literature and definitions, the quartz-like phases found in the three dental lithium silicates should be addressed as stuffed (probably low) quartz solid solutions instead of “virgilite”. However determined by mineralogical practices, the term “virgilite” for parts of the LiAlSi2O6 – SiO2 solid solution is ambiguous and can be considered as arbitrary.},
author = {Hurle, Katrin and Lubauer, Julia and Belli, Renan and Lohbauer, Ulrich},
doi = {10.1016/j.dental.2022.07.009},
faupublication = {yes},
journal = {Dental Materials},
keywords = {Crystal; Glass-ceramics; Lithium silicate; Quartz; Virgilite; X-ray diffraction},
note = {CRIS-Team Scopus Importer:2022-08-12},
peerreviewed = {Yes},
title = {{On} the assignment of quartz-like {LiAlSi2O6} - {SiO2} solid solutions in dental lithium silicate glass-ceramics: {Virgilite}, high quartz, low quartz or stuffed quartz derivatives?},
year = {2022}
}
@article{faucris.314050862,
abstract = {Erzgebirge ultrahigh-pressure (UHP) garnet peridotite includes scarce layers of garnet pyroxenite, nodules of garnetite and, very rarely, of eclogite. Peridotite-hosted eclogite shows the same subalkali-basaltic bulk rock composition, mineral assemblage and peak conditions as gneiss-hosted eclogite present in the same UHP unit. Garnetite has considerably more Mg, moderately enhanced Ca and Fe and significantly lower contents of Na, Ti, P, K and Si than eclogite, whereas Al is very similar. In addition, the compatible trace elements (Ni, Co, Cr, V) are elevated and most incompatible elements (Zr, Hf, Y, Sr, Rb and rare Earth elements [REE]) are depleted in garnetite relative to eclogite. In contrast to other large ion lithophile elements (LILEs), Pb (+121%) and Ba (+83%) are strongly enriched. The REE patterns of garnetite are characterized by depletion of light and heavy REE and a medium REE hump indicative of metasomatism, features being absent in eclogite. An exceptional garnetite sample shows an REE distribution similar to that of eclogite. Garnetite is interpreted to have formed from the same, but metasomatically altered, igneous protolith as eclogite. Except for Ba and Pb, the chemical signature of garnetite is explained best by metasomatic changes of its basaltic protolith caused by serpentinization of the host peridotite. Garnetite is chemically similar to basaltic rodingite/metarodingite. Although rodingite is commonly more enriched in Ca, there are also examples with moderately enhanced Ca matching the composition of Erzgebirge garnetite. Limited Ca metasomatism is attributed to the preservation of Ca in peridotite during hydrous alteration. This can be explained by incomplete serpentinization favouring metastable survival of the original clinopyroxene. In this case, most Ca is retained in peridotite and not available for infiltration and metasomatism of the garnetite protolith. This inescapable consequence is supported by the fact that clinopyroxene is part of the garnet peridotite UHP assemblage, which would not be the case if Ca had been removed from the protolith prior to high-pressure metamorphism. The enrichment of compatible elements in garnetite is attributed to decomposition of peridotitic olivine (Ni, Co) and spinel (Cr, V) during serpentinization. Enrichment of Ba and Pb contrasts the behaviour of other LILEs and is ascribed to dehydration of the serpentinized peridotite (deserpentinization). This requires two separate stages of metasomatism: (1) intense chemical alteration of the basaltic garnetite precursor, together with serpentinization of peridotite at the ocean floor or during incipient subduction; and (2) prograde metamorphism and dehydration of serpentinite during continued subduction, thereby releasing Pb–Ba-rich fluids that reacted with associated metabasalt. Finally, subduction to >100 km and UHP metamorphism of all lithologies led to formation of garnetite, eclogite and garnet pyroxenite hosted by co-facial garnet peridotite as observed in the Erzgebirge.},
author = {Schmädicke, Esther and Will, Thomas M.},
doi = {10.1111/jmg.12742},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {Erzgebirge; garnetite; rodingitization; serpentinization; UHP metamorphism},
note = {CRIS-Team Scopus Importer:2023-11-17},
pages = {1237-1259},
peerreviewed = {Yes},
title = {{Origin} of {Erzgebirge} ultrahigh-pressure garnetite: {Formation} from a basaltic protolith by serpentinization-assisted metasomatism?},
volume = {41},
year = {2023}
}
@article{faucris.268296715,
abstract = {This study investigated the osteogenic performance of new brushite cements obtained from Li+-doped β-tricalcium phosphate as a promising strategy for bone regeneration. Lithium (Li+) is a promising trace element to encourage the migration and proliferation of adipose-derived stem cells (hASCs) and the osteogenic differentiation-related gene expression, essential for osteogenesis. In-situ X-ray diffraction (XRD) and in-situ 1H nuclear magnetic resonance (1H NMR) measurements proved the precipitation of brushite, as main phase, and monetite, indicating that Li+ favored the formation of monetite under certain conditions. Li+ was detected in the remaining pore solution in significant amounts after the completion of hydration. Isothermal calorimetry results showed an accelerating effect of Li+, especially for low concentration of the setting retarder (phytic acid). A decrease of initial and final setting times with increasing amount of Li+ was detected and setting times could be well adjusted by varying the setting retarder concentration. The cements presented compressive mechanical strength within the ranges reported for cancellous bone. In vitro assays using hASCs showed normal metabolic and proliferative levels. The immunodetection and gene expression profile of osteogenic-related markers highlight the incorporation of Li+ for increasing the in vivo bone density. The osteogenic potential of Li-doped brushite cements may be recommended for further research on bone defect repair strategies.},
author = {Hurle, Katrin and Maia, F. R. and Ribeiro, V. P. and Pina, S. and Oliveira, J. M. and Götz-Neunhoeffer, Friedlinde and Reis, R. L.},
doi = {10.1016/j.bioactmat.2021.12.025},
faupublication = {yes},
journal = {Bioactive Materials},
keywords = {Alkaline phosphatase activity; Bone regeneration; Brushite cements; Collagen expression; Lithium doping; Osteogenic expression; β-tricalcium phosphate},
note = {CRIS-Team Scopus Importer:2022-01-21},
peerreviewed = {Yes},
title = {{Osteogenic} lithium-doped brushite cements for bone regeneration},
year = {2022}
}
@article{faucris.119632744,
author = {Seuß, Barbara and Titschack, Jürgen and Seifert, Severin and Neubauer, Jürgen and Nützel, Alexander},
faupublication = {yes},
journal = {Palaeogeography, Palaeoclimatology, Palaeoecology},
pages = {1-15},
peerreviewed = {Yes},
title = {{Oxygen} and stable carbon isotopes from a nautiloid from the middle {Pennsylvanian} ({Late} {Carboniferous}) impregnation {Lagerstätte} "{Buckhorn} {Asphalt} {Quarry}" - {Primary} paleo-environmental signals versus diagenesis},
volume = {319/320},
year = {2012}
}
@article{faucris.124025924,
abstract = {The dynamics of long range translation and local motions of oxygen in SrTi0.2 Fe0.8 O3-δ have been studied by electrical conductivity and quasielastic neutron scattering. The activation energy of the translational ionic diffusion measured by electrical conductivity is 0.97 eV for T>900°C. Both quasielastic linewidths and quasielastic intensities in neutron scattering show the presence of two motions. The Q independences indicate a localized character for these oxygen diffusion modes with activation energies of 0.43 and 0.27 eV for the "fast" and the "slow" local jumps, respectively. A model for the local oxygen motion is proposed involving oxygen jumps in the (0 k 0) plane either directly to the next unit cell or performing detours combining two and two site jumps resulting in the same final momentum transfer. © 2006 The American Physical Society.},
author = {Mashkina, Elena and Magerl, Andreas and Ollivier, Jacques and Göbbels, Matthias and Seifert, Friedrich},
faupublication = {yes},
journal = {Physical Review B - Condensed Matter and Materials Physics},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LM.oxygen},
pages = {214106},
peerreviewed = {unknown},
title = {{Oxygen} mobility in the perovskite {SrTi1}-{xFexO3}-ð (x = 0.8)},
volume = {74},
year = {2006}
}
@article{faucris.209005590,
author = {Schmädicke, Esther and et al.},
author_hint = {Will T., Zeh A., Gerdes A., Frimmel H., Millar I., Schmädicke E.},
doi = {10.1016/j.precamres.2009.03.008},
faupublication = {yes},
journal = {Precambrian Research},
keywords = {Gondwana assembly; East Antarctica; Zircon and monazite U-Pb and Th-U-Pb dating; Shackleton Range},
pages = {25-45},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Palaeoproterozoic} to {Palaeozoic} magmatic and metamorphic events in the {Shackleton} {Range}, {East} {Antarctica}: {Constraints} from zircon and monazite dating, and implications for the amalgamation of {Gondwana}},
volume = {172},
year = {2009}
}
@article{faucris.209005924,
author = {Schmädicke, Esther and et al.},
author_hint = {Romer T., Mezger K., Schmädicke E.},
doi = {10.1111/j.1525-1314.2009.00820.x},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {Antarctica; Pan-African orogeny; Eclogite facies; Sm-Nd age dating; Shackleton Range},
pages = {335-347},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Pan}-{African} eclogite facies metamorphism of ultramafic rocks in the {Shackleton} {Range}, {Antarctica}},
volume = {27},
year = {2009}
}
@article{faucris.283615492,
abstract = {When refractory castables are dried, hydrothermal conditions may result inside the bodies if the H2O cannot escape from the material. Under such high-pressure conditions, problems such as explosive spalling can arise. As different curing temperatures during the hydration of calcium aluminate cement (CAC)-bound castables lead to the formation of different hydrate phases, different microstructures can develop in the hardened material. This study presents the changes in porosity and in the mineralogical composition of a refractory castable model system under hydrothermal conditions depending on the curing temperature (5, 23 and 40 °C). Quantitative X-ray diffraction (QXRD) measurements show that different hydrate phases are formed during curing, while C3AH6 and boehmite are formed in the same quantities after hydrothermal treatment in an autoclave at ∼11 bar/180 °C. Although the mineralogical composition after autoclaving is not different, the three samples differ in their microstructure. Mercury intrusion porosimetry measurements reveal that although the total porosity after autoclaving is the same, the 40 °C samples have a higher proportion of large pores. SEM images also show that the appearance of C3AH6 in the 40 °C autoclaved samples varies, which originates from the starting phase composition and microstructure after curing.},
author = {Köhler, Andreas and Rößler, C. and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.ceramint.2022.09.353},
faupublication = {yes},
journal = {Ceramics International},
keywords = {Calcium aluminate (D); Porosity (B); Refractories (E); X-ray methods (B)},
note = {CRIS-Team Scopus Importer:2022-10-21},
peerreviewed = {Yes},
title = {{Phase} and porosity changes in a calcium aluminate cement and alumina system under hydrothermal conditions},
year = {2023}
}
@article{faucris.268156819,
abstract = {This study presents the influence of different curing temperatures and the availability of unbound H2O on the phase changes during the drying process of a simplified calcium aluminate cement bond castable. A mixture of CAC and alumina was hydrated for 48 h at 5, 23 and 40 °C, which represents different working conditions during casting. After the curing process, these samples were heated up to 180 °C, and in some of them, the remaining unbound H2O had been removed by vacuum drying beforehand. The quantitative phase composition was determined by QXRD. Thermogravimetric analysis and gravimetric measurements were also used to characterize the differently cured samples. While the mineral phases in the samples cured at 40 °C were barely affected by the heating process in the investigated temperature range, the initial conditions before the drying of the samples cured at 5 and 23 °C strongly affected the final phase composition.},
author = {Köhler, Andreas and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cement.2021.100020},
faupublication = {yes},
journal = {Cement},
keywords = {Curing; Drying; Hydration; Temperature; X-ray diffraction; Calcium aluminate cement; Refractory cement},
month = {Jan},
pages = {100020},
peerreviewed = {Yes},
title = {{Phase} changes during the drying of calcium aluminate cement bond castables – the influence of curing and drying conditions},
volume = {7},
year = {2022}
}
@article{faucris.215442744,
abstract = {A commercially available lithium (di)silicate glass-ceramic used for dental prostheses was characterized with respect to its quantitative phase composition and crystallinity. For analysis of quantitative phase content, X-ray diffraction (XRD) was used combined with the G-factor method, an external standard technique. Samples of the material were analyzed in the pre-crystallized state and after final crystallization heat-treatment in order to characterize the changes occurring during the final crystallization stage. The bulk chemical composition of the commercial blocks, matching the composition of the precursor glass, was determined by a combination of X-ray Fluorescence (XRF) and Inductively Coupled Plasma - Optical Emission Spectroscopy (ICP-OES) analysis.},
author = {Hurle, Katrin and Belli, Renan and Götz-Neunhoeffer, Friedlinde and Lohbauer, Ulrich},
doi = {10.1016/j.jnoncrysol.2019.01.027},
faupublication = {yes},
journal = {Journal of Non-Crystalline Solids},
note = {CRIS-Team WoS Importer:2019-04-04},
pages = {42-50},
peerreviewed = {Yes},
title = {{Phase} characterization of lithium silicate biomedical glass-ceramics produced by two-stage crystallization},
volume = {510},
year = {2019}
}
@inproceedings{faucris.115499604,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
faupublication = {yes},
note = {UnivIS-Import:2015-03-05:Pub.1998.nat.dgeo.IGM.LM.phasec},
pages = {106},
peerreviewed = {Yes},
title = {{Phase} {Composition} of {Phosphate} {Containing} {OPC} {Clinker}},
year = {1998}
}
@article{faucris.112213024,
abstract = {The phase relations in the system CaO-Al2O3-Y2O3 at 1400 and 1500 °C have been determined. The phase relations presented are in agreement with the calculated phase diagram by Udalov et al. (Russ. J. Inorg. Chem., 1979, 24(10), p 1549-1553). In addition ternary solid solution series of the binary compounds YAM (Y4Al2O9), YAP (YAlO3), and YAG (Y3Al5O12) could be described.},
author = {Richter, Andreas and Göbbels, Matthias},
doi = {10.1007/s11669-010-9672-1},
faupublication = {yes},
journal = {Journal of Phase Equilibria and Diffusion},
keywords = {crystal;chemistryphase;equilibria;Y-gehlenite;YAG;YAM;YAP},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.phasee},
pages = {157-163},
peerreviewed = {Yes},
title = {{Phase} {Equilibria} and {Crystal} {Chemistry} in the {System} {CaO}-{Al{\_}2{\_}O{\_}3{\_}}-{Y{\_}2{\_}O{\_}3{\_}}},
volume = {31},
year = {2010}
}
@inproceedings{faucris.121562584,
author = {Nikasch, Christian and Göbbels, Matthias},
booktitle = {Berichte der DMG},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2003.nat.dgeo.IGM.LM.phasen},
pages = {141},
peerreviewed = {unknown},
series = {Beiheft zum European Journal of Mineralogy},
title = {{Phasenbeziehungen} im {System} {SrO}-{BaO}-{Nb2O5} photorefraktiver {Materialien}},
venue = {Bochum},
volume = {15},
year = {2003}
}
@article{faucris.116105484,
abstract = {In this paper we report the phase relations of the tetragonal tungsten bronze type strontium barium niobate (SrxBa1−xNb2O6) solid solution in the temperature range from 1200°C to 1450°C. The x-value depends on the synthesis temperature and reaches from 0.19 ⩽ x ⩽ 0.62 at 1200°C up to 0.18 ⩽ x ⩽ 0.84 at 1440°C. In addition lattice parameters of the stable phases at 1300°C depending on their chemical compositions are given.
Samples with different SrO:BaO:Nb2O5 ratios were sintered in vertical tube furnaces at suitable temperatures in air. The chemical composition of the quenched equilibrated phase associations were determined by EPMA. Lattice parameters of the resulting crystalline phases were derived from refinement of d-values from XRD patterns.
The phase field of SBN is strongly temperature dependent. The Ba-rich end-member of the solid solution contains 80 mol% Ba and 20 mol% Sr independently of the synthesis temperature. On the other hand the maximum Sr-content of the solid solution increases with temperature from 62 mol% Sr at 1200°C up to 84 mol% Sr at 1450°C. Also the Nb-content varies with temperature especially at synthesis temperatures below 1400°C. In particular at 1300°C the solid solution field of SBN extents to higher Nb-contents on the Ba-rich side leading to a Sr-free end-member of the solid solution. For this Ba-rich side of the solid solution series a substitutional formula Ba4Sr1−yNbyNb10O30+1.5y (0 ⩽ y ⩽ 1) can be given.
A new compound (Sr, Ba)5Nb8O25 in the SrO–BaO–Nb2O5 system has been found, exhibiting also a solid solution range. Chemical compositions of some previously described phases could be determined in more detail.
The lattice parameters of the tetragonal tungsten bronze cell (A12A24C4M12M28O30) depend on the chemical composition of the solid solution. In the Sr-rich region and at low Nb-contents the a-parameter shifts strongly while on the Ba-rich side and at high Nb-contents the variation is lower. The c-parameter increases with the Ba-conten},
author = {Göbbels, Matthias and et al.},
author_hint = {Nikasch Christian, Göbbels Matthias},
doi = {10.1016/j.jcrysgro.2004.04.037},
faupublication = {yes},
journal = {Journal of Crystal Growth},
keywords = {A1. Phase diagrams; A1. Solid solution; B1. Niobates; B2. Photo-refractive materials},
note = {UnivIS-Import:2015-03-09:Pub.2004.nat.dgeo.IGM.LM.phaser},
pages = {324 - 332},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Phase} relations and lattice parameters in the system {SrO}-{BaO}-{Nb2O5} focussing on {SBN} ({SrxBa1}-{xNb2O6})},
volume = {269},
year = {2004}
}
@article{faucris.106136844,
abstract = {Alpine-type peridotites and associated pyroxenites are found as lenses in the continental crust in many different orogens. The reconstruction of the pressure-temperature (P-T) evolution of these rocks is, however, difficult or even impossible. With geothermobarometry, usually one point on the overall P-T path can be obtained. To use the different mineral assemblages observed in ultramafic rocks as P-T indicators, quantitative P-T phase diagrams are required. This study presents new calculated phase diagrams for peridotitic and pyroxenitic rocks in the model systems CaO-MgO-Al2O3-SiO2-H2O (CMASH) and Na2O-CaO-MgO-Al2O3-SiO2-H2O (NCMASH), which include the respective solid solutions as continuous exchange vectors. These phase diagrams represent applicable petrogenetic grids for peridotite and pyroxenite. On the basis of these general petrogenetic grids, phase diagrams for particular peridotite and pyroxenite bulk compositions are constructed. In an example of pyroxenite from the Shackleton Range, Antarctica, the different observed mineral assemblages are reflected by the phase diagrams. For these rocks, a high-pressure metamorphic stage around 18 kbar and an anticlockwise P-T evolution, not recognized previously, can be inferred.},
author = {Schmädicke, Esther},
faupublication = {no},
journal = {Journal of Petrology},
keywords = {Antarctic; High-pressure metamorphism; Peridotite; Phase diagrams; Pyroxenite},
note = {UnivIS-Import:2017-03-24:Pub.2000.nat.dgeo.IGM.profes{\_}1.phaser{\_}26},
pages = {69-86},
peerreviewed = {Yes},
title = {{Phase} relations in peridotitic and pyroxenitic rocks in the model systems {CMASH} and {NCMASH}},
volume = {41},
year = {2000}
}
@article{faucris.209006559,
author = {Schmädicke, Esther and et al.},
author_hint = {Will T., Okrusch M., Schmädicke E., Chen G.},
doi = {10.1007/s004100050406},
faupublication = {no},
journal = {Contributions To Mineralogy and Petrology},
pages = {85-102},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Phase} relations in the greenschist-blueschist-amphibolite-eclogite facies in the system {Na2O}-{CaO}-{FeO}-{MgO}-{Al2O3}-{SiO2}-{H} {2O} ({NCFMASH}), with application to metamorphic rocks from {Samos}, {Greece}},
volume = {132},
year = {1998}
}
@article{faucris.106108024,
abstract = {Lenses of ultramafic rocks intercalated within a metagabbro-amphibolite sequence were encountered in the KTB pilot hole. A pervasive metamorphic overprint formed the dominating assemblage calcic amphibole-orthoamphibole- chlorite-talc. In this study the phase relations of ultramafic rocks are investigated in order to (a) constrain the stability field of this assemblage in general, and (b) define the equilibrium pressure-temperature (P-T) conditions of this assemblage in the ultramafic rocks from the KTB borehole. For that purpose, phase equilibria were calculated in the model systems CaO-MgO-Al 2O3-SiO2-H2O (CMASH) and CaO-MgO-FeO-Al2O3-SiO2-H2O (CMFASH). Thereby, the continuous compositional change of solid solutions with pressure and temperature was modeled, including the Tschermak's substitution and the MgFe-1 exchange. Based on these results, petrogenetic grids were constructed, revealing that calcic amphibole-orthoamphibole-chlorite-talc assemblages cover a stability field of < 650-770°C/1 → 14 kbar (CMASH) and < 550-650°C/1 → 14 kbar (CMFASH), respectively. This explains the widespread occurrence of the considered assemblage. Based on the bulk rock composition of the KTB samples, a special P-T diagram was constructed, limiting the stability field of the calcic amphibole-orthoamphibole-chlorite- talc assemblage. At 580°C the stability field extends from 6 to 14 kbar pressure, and shrinks to 10-11 kbar at 630°C. Conventional estimates using the mineral compositions of the KTB samples yield a temperature around 630°C, at which the calculated stability field of calcic amphibole-orthoamphibole-chlorite-talc extends from 10 to 11 kbar. © Springer-Verlag 1997.},
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke Esther, Okrusch M.},
faupublication = {no},
journal = {International Journal of Earth Sciences},
keywords = {Bohemian massif; Geothermobarometry; KTB; Metamorphic rocks; Phase petrology; Ultramafic rocks; Variscides; Zone of Erbendorf-Vohenstrauss},
note = {UnivIS-Import:2017-03-24:Pub.1997.nat.dgeo.IGM.profes{\_}1.phaser},
pages = {212-221},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Phase} relations of calcic amphibole- orthoamphibole-chlorite-talc assemblages, with applications to ultramafic rocks from the {KTB} pilot hole, {Bavaria}},
volume = {86},
year = {1997}
}
@article{faucris.237248527,
abstract = {The reaction of CA (monocalcium aluminate) with calcite was closely monitored with regard to phase development, pore water ion content and heat flow. Calcite acts as filler and reactant, finally leading to thermodynamically stable products after hydration at ambient conditions. For better understanding the mechanism taking place, a CA-cement and a commercial calcite mix were compared to a pure CA and pure calcite mix. Both reaction paths were compared. Thermodynamic modeling with PhreeqC gave insight about factors that can influence the course of the hydration reaction. Alkali ions in pore solution of the CA-cement relocate solubility curves of hydration products. Taking into account as many of the alkaline ions as possible, resulted in the closest representation of the measured phase content, confirming thermodynamic modeling. The high dynamics that develop during reaction could only be addressed if a concentration of alkalis in the pore solution at later points in time was respected, thus leading to a shift of solubility curves over time. This was not observed with the pure CA in absence of alkalis.},
author = {Manninger, Tanja and Jansen, Daniel and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.3390/ma13061406},
faupublication = {yes},
journal = {Materials},
keywords = {CA; Calcite; Hydration kinetics; Modelling; Pore water},
note = {CRIS-Team Scopus Importer:2020-04-14},
peerreviewed = {Yes},
title = {{Phase} solubility changes during hydration of monocalciumaluminate and calcite-the influence of alkali accumulation},
volume = {13},
year = {2020}
}
@article{faucris.221872968,
abstract = {Calcium carbonate is an abundant biomineral, and already archeological records demonstrate its bioactivity and applicability for osseo-integrative implants. Its solubility, which is generally higher than those of calcium phosphates, depends on its polymorph turning calcium carbonate into a promising biomaterial with tunable bioresorption rate. However, the phase-dependent bioactivity of calcium carbonate, i.e., its osteoconductivity, is still insufficiently characterized. In this study, we address this issue by monitoring the behavior of the four most important calcium carbonate phases, i.e., calcite, aragonite, vaterite, and amorphous calcium carbonate, in simulated body fluid solution at 37 °C. Our results demonstrate that the thermodynamically stable calcite phase is essentially inert. In contrast, the metastable phases aragonite and vaterite are bioactive, thus promoting the formation of calcium phosphate. Amorphous calcium carbonate (ACC) shows prominent bioactivity accompanied by pronounced redissolution processes. Mg-stabilized ACC was additionally tested since its increased stability eases formulation and handling in future applications. It is highly bioactive and, moreover, the additional release of Mg promotes cell viability. Overall, our results demonstrate that bioactivity of calcium carbonate is phase-dependent, allowing tailored response and bioactivity of future calcareous biomaterials. Our results also reveal that phosphate ions strongly interfere with Ostwald-Lussac step ripening of calcium carbonate, kinetically stabilizing metastable polymorphs such as vaterite and aragonite; this is a distinctive feature of the calcium carbonate mineral system which clearly has to be considered in future applications of calcium carbonate as a bioceramic.},
author = {Myszka, Barbara and Schüßler, Martina and Hurle, Katrin and Demmert, Benedikt and Detsch, Rainer and Boccaccini, Aldo R. and Wolf, Stephan},
doi = {10.1039/c9ra01473j},
faupublication = {yes},
journal = {RSC Advances},
note = {CRIS-Team Scopus Importer:2019-07-09},
pages = {18232-18244},
peerreviewed = {Yes},
title = {{Phase}-specific bioactivity and altered {Ostwald} ripening pathways of calcium carbonate polymorphs in simulated body fluid},
volume = {9},
year = {2019}
}
@book{faucris.310823769,
abstract = {Dieses Buch stellt das Grundwissen der Mineralogie knapp und verständlich dar. Als Studierende der Mineralogie, Geowissenschaften, Werkstoff-/ Materialwissenschaften und benachbarter Fachrichtungen, werden Ihnen die essentiellen physikalisch-chemischen Grundlagen in diesem Lehrbuch übersichtlich vorgestellt. Als Absolventen dient Ihnen diese kurze Zusammenstellung hervorragend zum Nachschlagen der wichtigsten Fakten.
Es werden vier große Kernbereiche behandelt:
Die Kristallographie, von den Grundlagen der Symmetrie bis hin zum Realkristall, vom Feinbau der Kristalle über die Bravais Gitter, röntgenographische Grundlagen bis zum Realbau der Kristalle.
Die Kristallchemie, mit den grundlegenden Prinzipien, chemischen Variationen und ausgewählten Begrifflichkeiten.
Die Mineralphysik, mit einem Überblick der physikalischen Eigenschaften von Kristallen.
Und die Phasenlehre mit geometrischer Betrachtung und Interpretation von unären, binären und ternären Systemen allgemeiner Ar},
address = {Berlin, Heidelberg},
author = {Göbbels, Matthias and Goetze, Jens and Lieber, Werner},
doi = {10.1007/978-3-662-60728-2},
faupublication = {yes},
isbn = {9783662607275},
keywords = {in Stichworten; Kristallographie; Kristallografie; Mineralpyhsik; Phasenlehre; geometrisch; Bravais Gitter; röntgenographische; Realkristall; Verzwillingungen; Materialwissenschaften},
peerreviewed = {unknown},
publisher = {Springer Spektrum},
title = {{Physikalisch}-chemische {Mineralogie} kompakt},
year = {2020}
}
@article{faucris.227602801,
abstract = {Influences of four polymer latexes with varied glass-transition-temperature (Tg) and colloidal surface properties on pore structure of hardened cement pastes (hcps) were investigated by means of mercury intrusion porosimetry (MIP), nitrogen adsorption measurement (NAM) and SEM. MIP measurement indicates that polymer addition leads to increase of total pore volume and threshold pore size, whereas NAM shows that pore volume in the range of 2–100 nm decreases with addition of polymers, implying a sealing effect. The conflicting results between MIP and NAM originate from destruction and movement of the polymer phase by high pressure mercury intrusion during MIP measurement. SEM reveals that low-Tg polymers form continuous film while high-Tg polymers remain particle form in hcps. The film-forming polymers provide stronger sealing effect than the non-film-forming polymers. Moreover, the non-adsorbing polymers exhibit stronger sealing effect than the adsorbing polymers due to their preferential locations in aqueous phase of fresh cement paste.},
author = {Zhang, Chaoyang and Kong, Xiangming and Lu, Zichen and Jansen, Daniel and Pakusch, Joachim and Wang, Shengxian},
doi = {10.1016/j.cemconcomp.2018.11.001},
faupublication = {yes},
journal = {Cement & Concrete Composites},
keywords = {Hardened cement paste (hcp); Polymer latex; Pore structure; Sealing effect},
month = {Jan},
note = {CRIS-Team Scopus Importer:2019-10-08},
pages = {154-168},
peerreviewed = {Yes},
title = {{Pore} structure of hardened cement paste containing colloidal polymers with varied glass transition temperature and surface charges},
volume = {95},
year = {2019}
}
@article{faucris.120142924,
abstract = {Ceramic foams were prepared by a self-blowing process of a poly(silsesquioxane) melt at 270 °C. The cell size, the interconnectivity density and the shape of the foam cells were adjusted by a thermal pre-curing procedure of the polymer at 200 °C. Inorganic fillers were used to modify processing behaviour and properties of the pyrolysed ceramic foam. After pyrolysis in inert atmosphere at 1200 °C ceramic composite foams with a total porosity up to 87% were obtained. The open cell ceramic foams had a mean cell diameter of 1.2 mm and a mean strut thickness of 0.2 mm. Interpenetrating phase composites (IPCs) were fabricated by infiltrating the open cellular ceramic preform with Mg alloy melt at 680 °C and a pressure of 86 MPa. The mechanical properties were found to depend on the reactions between the metal and the ceramic forming MgO, Mg2Si and Al12Mg17 as the major reaction products. The IPCs showed a significantly higher creep resistance at 135 °C, compression strength and elastic modulus compared to the unreinforced magnesium alloys. © 2003 Elsevier Ltd. All rights reserved.},
author = {Zeschky, Jürgen and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Lo, S.H. Jason and Kummer, Bernhard and Scheffler, Michael and Greil, Peter},
doi = {10.1016/S0266-3538(03)00269-0},
faupublication = {yes},
journal = {Composites Science and Technology},
keywords = {Ceramic foam},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.precer},
pages = {2361-2370},
peerreviewed = {Yes},
title = {{Preceramic} polymer derived cellular ceramics},
volume = {63},
year = {2003}
}
@article{faucris.209007783,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Will T.},
doi = {10.1046/j.1525-1314.2003.00482.x},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {Exhumation; Cyclades; Pseudosection; High-pressure metamorphism; Sifnos},
pages = {799-811},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Pressure}-temperature evolution of blueschist facies rocks from {Sifnos}, {Greece}, and implications for the exhumation of high-pressure rocks in the {Central} {Aegean}},
volume = {21},
year = {2003}
}
@article{faucris.268141028,
abstract = {Biomineralizing organisms are widely praised for their ability to generate structural materials with exceptional crystallographic control. While earlier studies highlighted near-to single-crystalline biominerals, complex polycrystalline features are more widespread yet challenging to account for. Here, we propose that biominerals whose crystal texture varies with depth are functionally graded materials. Using the exemplary case of the nacro-prismatic pearl oyster Pinctada margaritifera, we demonstrate systematic textural changes in a biogenic ceramic. This bivalve employs three synergistic mechanisms to generate a texture gradient across its outer calcitic shell layer. This prismatic layer transitions from an initially weakly-textured to a strongly-textured material. Such changes in texture cause a variation in Young's modulus normal to the shell, owing to the anisotropic mechanical properties of the composing crystallites. Based on finite-element simulations and indentation experiments on the bivalve shell, we conclude that such graded bioceramics yield intrinsic toughening properties similar to those found in compositionally-graded synthetic materials. Notwithstanding, the gradation concept of Pinctada margaritifera is unparalleled among synthetic materials as it rests solely upon elastic anisotropy, making oyster shells potential blueprints for future bioinspired functional materials and damage-resistant ceramics.},
author = {Wallis, David and Harris, Joseph and Böhm, Corinna and Wang, Di and Zavattieri, Pablo and Feldner, Patrick and Merle, Benoit and Pipich, Vitaliy and Hurle, Katrin and Leupold, Simon and Hansen, Lars N. and Marin, Frederic and Wolf, Stephan},
doi = {10.1039/d1ma01031j},
faupublication = {yes},
journal = {Materials Advances},
note = {CRIS-Team WoS Importer:2022-01-14},
peerreviewed = {Yes},
title = {{Progressive} changes in crystallographic textures of biominerals generate functionally graded ceramics},
year = {2021}
}
@article{faucris.273564006,
abstract = {The standard preparation routine of a calcium phosphate cement includes mixing a solid and a liquid component (reactive cement powder and mixing liquid) in an open bowl at the operating theatre. This poses the risk of preparation-related deviations of the resulting properties when the cements are mixed by different persons. Hence, facilitating this mixing procedure is highly desirable. It can be achieved by application of premixed cement pastes: The mixing liquid and a stable suspension of the cement powder are assembled and mixed in a special syringe, minimizing the impact of these preparation-related effects. In this study, a suspension of reactive α-tricalcium phosphate powder in water was stabilized by sodium pyrophosphate decahydrate (PP). Controlled activation of these premixed pastes was then accomplished by adding a concentrated Na2HPO4/NaH2PO4 (Na2/Na) solution. Systematic assessment of the activation mechanism, including the effect of the PP concentration and the amount of Na2/Na added, was performed by isothermal calorimetry, quantitative in-situ X-ray diffraction, rheological characterization and automated Gillmore needle measurements at 37 °C. Premixed pastes with addition of at least 0.05 wt% PP were successfully stabilized for up to 2 weeks at 25 °C, and even 4 weeks at 4 °C. This pre-storage had no significant impact on the setting performance of the pastes. Increasing the PP concentration at constant Na2/Na amount systematically retarded the setting reaction, while an elevated quantity of Na2/Na addition at constant PP concentration resulted in an acceleration. Based on these results, a composition stabilized with 0.05 wt% PP and activated with 20.8 vol% Na2/Na related to the amount of liquid in the premixed pastes appears ideal with respect to the desired setting performance.},
author = {Weichhold, Jan and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin and Gbureck, Uwe},
doi = {10.1016/j.ceramint.2022.02.073},
faupublication = {yes},
journal = {Ceramics International},
keywords = {Apatite (D); Biomedical applications (E); Premixed cement pastes; X-ray methods (B)},
note = {CRIS-Team Scopus Importer:2022-04-22},
pages = {15390-15404},
peerreviewed = {Yes},
title = {{Pyrophosphate} ions inhibit calcium phosphate cement reaction and enable storage of premixed pastes with a controlled activation by orthophosphate addition},
volume = {48},
year = {2022}
}
@article{faucris.118430004,
abstract = {Alite and beute are the main components in ordinary portland cement. The quantification by X-ray diffraction methods is very difficult due to the wide range of overlapping reflections. The presented investigations deal with the quantification by fullprofile refinement. To get good structure data of alite and belite both were synthesized in a laboratory furnace at 1400°C. Their chemical composition was the same as that of alite and belite of technically produced cement clinker (modified composition proposed by Taylor 1990 [1]). X-ray investigation of alite shows best fits to the monoclinic superstructure published by Nishi & Takeuchi (1985) [2]. Belite could be described by the structure data of Jost et al. (1977) [3]. Both structures were refined by the Rietveld PC software of Wiles and Young modified by Howard. Afterwards synthetic alite and belite were mixed in different ratios and quantified by the same software. Three different mixtures show a smaller deviation from the input than 1 wt.%.},
author = {Neubauer, Jürgen and Sieber, Roland},
faupublication = {yes},
journal = {Materials Science Forum},
keywords = {Portland Cement; Quantification; Rietveld Method; Synthetic Mixture},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.quanti{\_}9},
pages = {807-812},
peerreviewed = {Yes},
title = {{Quantification} of a mixture of synthetic {Alite} and {Belite} by the {Rietveld} method},
volume = {Vols 228-231},
year = {1996}
}
@article{faucris.115345384,
author = {Neubauer, Jürgen and Sieber, Roland and Kuzel, Hans Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1995.nat.dgeo.IGM.LM.quanti},
pages = {176},
peerreviewed = {Yes},
title = {{Quantifizierung} von {Mischungen} aus synthetischem {Alit} und {Belit} mit {Hilfe} der {Rietveld} {Methode}},
year = {1995}
}
@inproceedings{faucris.115659324,
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Muck, Michael and Hans-Willhelm, Meyer},
booktitle = {14. Internationale Baustofftagung IBAUSIL},
date = {2000-09-20/2000-09-23},
faupublication = {yes},
note = {UnivIS-Import:2015-04-16:Pub.2000.nat.dgeo.IGM.LM.quanti{\_}80},
pages = {391-405},
peerreviewed = {unknown},
title = {{Quantitative} {Analyse} des {CO{\_}2{\_}}-{Gehaltes} im {Heißmehl} der {PZ}-{Klinkerproduktion}},
venue = {Weimar},
volume = {2},
year = {2000}
}
@article{faucris.111683264,
abstract = {Glass-ceramic composites like low-temperature cofired ceramics are densified at temperatures below 900°C via liquid-phase sintering. For high-frequency applications, materials with low dielectric losses are needed. At these frequencies glass exhibits higher dielectric losses than a crystalline phase; therefore, the glass amount is reduced after densification by crystallization. To perform a quantitative X-ray analysis of such glass-ceramic composites, a method based on Rietveld refinement was developed. For optimum results, the X-ray diffraction patterns were fitted using the software TOPAS 2.1 from Bruker AXS. With this method, it is possible to determine quantitatively the amount of crystalline phases and also the amount of the remaining amorphous phase. © 2006 The American Ceramic Society.},
author = {Kemethmüller, Stefan and Roosen, Andreas and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1111/j.1551-2916.2006.01113.x},
faupublication = {yes},
journal = {Journal of the American Ceramic Society},
note = {UnivIS-Import:2015-03-09:Pub.2006.nat.dgeo.IGM.LM.quanti},
pages = {2632-2637},
peerreviewed = {Yes},
title = {{Quantitative} analysis of crystalline and amorphous phases in glass-ceramic composites like {LTCC} by the rietveld method},
volume = {89},
year = {2006}
}
@article{faucris.113216224,
abstract = {In this study about the early hydration of monoclinic alite, a method is presented that allows to follow the formation of the Calcium-Silicate-Hydrates directly and quantitatively over time. The combination of the PONKCS method [20] and the G-factor method [6] allowed the refinement and calibration of a C-S-H phase model which can be used for direct quantification of C-S-H in cementitious pastes. The comparison between the heat flow measured by calorimetry and the heat flow calculated from the phase development of C-S-H revealed that C-S-H formation starts later than is indicated by the measured heat flow. It is therefore assumed that the silicate reaction proceeds the following way: A not XRD-detectable C-S-H phase is precipitated which then evolves into a long-range ordered, XRD-detectable C-S-H. This C-S-H acts as a nucleation site for further long-range ordered C-S-H and leads to the acceleration of alite dissolution and direct formation of C-S-H. © 2013 Elsevier Ltd.},
author = {Bergold, Sebastian and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2013.06.001},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ca ; Calcium-silicate-hydrates (C-S-H); Calorimetry (A); Hydration (A); X-ray diffraction (B)},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.quanti},
pages = {119-126},
peerreviewed = {Yes},
title = {{Quantitative} analysis of {C}{S}{H} in hydrating alite pastes by in-situ {XRD}},
year = {2013}
}
@inproceedings{faucris.281172032,
abstract = {The C-S-H-phase is the most important strength generating phase in concrete and other cementitious materials. The analysis of C-S-H is therefore an important instrument of innovations in the field of concrete and its durability and sustainability. The quantification and insights in C-S-H are hindered by the predominantly amorphous structure of C-S-H. Only the time consuming and expensive solid state nuclear magnetic resonance spectroscopy (NMR) gives a chance to get results, but is restricted to model substances. A new technique, based on the cheap and widespread infrared-spectroscopy (IR) was developed. The quantitative analysis is based on the silicon content in the different structural units of C-S-H and a calibration with natural and synthetic materials with known silicon content in these units. The technique allows to investigate specimens from real structures. Specimens with quartz or limestone aggregate can be analyzed directly. In other cases the aggregates must be separated, for example with heavy liquid separation. Tests with different mortars showed a good correspondence of measured and expected values of C-S-H concentration.},
author = {Schmidt-Döhl, Frank Michael and Schulenberg, David and Tralow, Franziska and Neubauer, Jürgen and Wolf, Julian and Ectors, Dominique},
booktitle = {Acta Polytechnica CTU Proceedings},
date = {2021-09-08/2021-09-10},
doi = {10.14311/APP.2022.33.0539},
editor = {Katerina Sojkova, Petr Hajek, Ctislav Fiala},
faupublication = {yes},
isbn = {9788001069646},
keywords = {Calcium-Silicate-Hydrate (C-S-H); quantitative analysis; spectroscopy},
note = {CRIS-Team Scopus Importer:2022-09-02},
pages = {539-545},
peerreviewed = {unknown},
publisher = {Czech Technical University in Prague},
title = {{QUANTITATIVE} {ANALYSIS} {OF} {THE} {STRENGTH} {GENERATING} {C}-{S}-{H}-{PHASE} {IN} {CONCRETE} {BY} {IR}-{SPECTROSCOPY}},
venue = {Prague},
volume = {33},
year = {2022}
}
@article{faucris.112007764,
abstract = {Technical OPC contains mixed sulfate carriers in varying amounts. Gypsum and anhydrite are added to the clinker during the milling process where the gypsum dehydrates partially to bassanite and anhydrite. Due to different hydration kinetics of these phases, it is crucial to be able to characterize the composition of sulfate in a cement system to reach an optimal and reproducible cement hydration. In the current paper different calcium sulfate compositions are investigated by XRD methods in order to identify phase content. Special focus is put on the discrimination of the hemihydrate (bassanite) and anhydrite III as well as on transformation processes of anhydrite III through ambient humidity. © 2009 Elsevier Ltd. All rights reserved.},
author = {Seufert, Sebastian and Hesse, Christoph and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2009.06.018},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium sulfate; Hydration; Portland cement; X-ray diffraction characterization},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.quanti},
pages = {936-941},
peerreviewed = {Yes},
title = {{Quantitative} determination of anhydrite {III} from dehydrated gypsum by {XRD}},
year = {2009}
}
@inproceedings{faucris.115602784,
author = {Muck, Michael and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hans-Willhelm, Meyer},
faupublication = {yes},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LM.quanti{\_}7},
pages = {162},
peerreviewed = {Yes},
title = {{Quantitative} determination of the decarbonation degree in hot meal of {OPC} {Production} by {XRD}},
year = {1999}
}
@article{faucris.117075024,
abstract = {Investigation into the early hydration of Portland cement was performed by in situ X-ray diffraction (XRD). Technical white cement was used for the XRD analysis on a D5000 diffractometer (Siemens). All diffraction patterns of the in situ measurement which were recorded up to 22 h of hydration at defined temperatures were analyzed by Rietveld refinement. The resulting phase composition was transformed with respect to free water and C-S-H leading to the total composition of the cement paste. The hydration reactions can be observed by dissolution of clinker phases as well as by the formation of the hydrate phases ettringite and portlandite. With increasing temperatures the reactions proceed faster. The formation of ettringite is directly influenced by the rate of dissolution of anhydrite and tricalcium aluminate (C3 A). The beginning of the main period of hydration is marked by the start of portlandite formation. The experiments point out that a quantitative phase analysis of the cement hydration is feasible with standard laboratory diffractometers. © 2009 International Centre for Diffraction Data.},
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hesse, Christoph and Gäberlein, Peter and Bräu, Michael},
doi = {10.1154/1.3120603},
faupublication = {yes},
journal = {Powder Diffraction},
keywords = {Cement; Hydration; In situ XRD; Rietveld analysis},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.quanti{\_}9},
pages = {112-115},
peerreviewed = {Yes},
title = {{Quantitative} in-situ {X}-ray diffraction analysis of early hydration of {Portland} cement at defined temperatures},
volume = {24},
year = {2009}
}
@article{faucris.119936784,
author = {Neubauer, Jürgen and Sieber, Roland},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.quanti},
pages = {201},
peerreviewed = {Yes},
title = {{Quantitative} {Röntgenbeugungsanalyse} an {Portlandzementklinkern} mit {Hilfe} der {Rietveld} {Methode}},
year = {1996}
}
@article{faucris.110851004,
author = {Neubauer, Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.quanti{\_}0},
pages = {138},
peerreviewed = {Yes},
title = {{Quantitative} {Röntgenbeugungsanalyse} zur {Prozessoptimierung} bei der {Portlandzementproduktion}},
year = {2000}
}
@inproceedings{faucris.122157684,
author = {Muck, Michael and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Hans-Willhelm, Meyer},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.quanti},
pages = {133},
peerreviewed = {Yes},
title = {{Quantitative} röntgenographische {Bestimmung} des {Entsäuerungsgrades} im {Portlandzement}-{Heißmehl}},
year = {2000}
}
@misc{faucris.120995204,
author = {Neubauer, Jürgen},
faupublication = {yes},
note = {UnivIS-Import:2016-07-26:Pub.1999.nat.dgeo.IGM.LM.quanti{\_}20},
peerreviewed = {automatic},
title = {{Quantitative} röntgenographische {Phasenanalyse} an {Portlandzementklinkern} - {Grundlagen} und {Anwendung}},
year = {1999}
}
@article{faucris.209008103,
author = {Schmädicke, Esther},
doi = {10.1127/ejm/3/2/0231},
faupublication = {no},
journal = {European Journal of Mineralogy},
pages = {231-238},
peerreviewed = {Yes},
title = {{Quartz} pseudomorphs after coesite in eclogites from the {Saxonian} {Erzgebirge}},
volume = {3},
year = {1991}
}
@article{faucris.209008378,
author = {Schmädicke, Esther and Will, Thomas M. and Ling, Xiaoxiao and Li, Xian-Hua and Li, Qiu-Li},
doi = {10.1016/j.lithos.2018.10.017},
faupublication = {yes},
journal = {Lithos},
keywords = {Erzgebirge; Exhumation; Eclogite; UHP metamorphism; Symplectite; U-Pb dating},
pages = {250-267},
peerreviewed = {unknown},
title = {{Rare} peak and ubiquitous post-peak zircon in eclogite: {Constraints} for the timing of {UHP} and {HP} metamorphism in {Erzgebirge}, {Germany}},
volume = {322},
year = {2018}
}
@article{faucris.250192401,
author = {Scherb, Sebastian and Maier, Matthias and Beuntner, Nancy and Thienel, Karl Christian and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2021.106382},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Supplementary cementitious material; Thermogravimetry; In situ X-ray diffraction; Reaction kinetics; Calorimetry; Calcined clay},
peerreviewed = {Yes},
title = {{Reaction} kinetics during early hydration of calcined phyllosilicates in clinker-free model systems},
volume = {143},
year = {2021}
}
@article{faucris.121511324,
abstract = {Addition of ductile polymers to calcium-deficient hydroxyapatite (CDHA)—forming bone cements based on α-tricalcium phosphate (α-TCP) is a promising approach to improve the mechanical performance of α-TCP cements and extend their application to load-bearing defects, which is else impeded by the brittleness of the hardened cement. One suitable polymer is poly-(2-hydroxyethylmethacrylate) (p-HEMA), which forms during cement setting by radical polymerisation of the monomer. In this study the hydration kinetics and the mechanical performance of α-TCP cements modified with addition of different HEMA concentrations (0–50 wt% in the cement liquid) was investigated by quantitative in situ XRD and four-point bending tests. Morphology of CDHA crystals was monitored by scanning electron microscopy. The hydration of α-TCP to CDHA was increasingly impeded and the visible crystal size of CDHA increasingly reduced with increasing HEMA concentration. Modification of the cements by adding 50 wt% HEMA to the cement liquid changed the brittle performance of the hardened cement to a pseudoplastic behaviour, reduced the flexural modulus and increased the work of fracture, while lower HEMA concentrations had no significant effect on these parameters. In such a composite, the extent of CDHA formation was considerably reduced (34.0 ± 1.8 wt% CDHA with 50 % HEMA compared to 54.1 ± 2.4 wt% CDHA in the reference formed after 48 h), while the general reaction kinetics were not changed. In conclusion, while the extent of CDHA formation was decreased, the mechanical properties were noticeably improved by addition of HEMA. Hence, α-TCP/HEMA composites might be suitable for application in some load-bearing defects and have adequate properties for mechanical treatment after implantation, like insertion of screws.},
author = {Hurle, Katrin and Christel, Theresa and Gbureck, Uwe and Moseke, Claus and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1007/s10856-015-5616-y},
faupublication = {yes},
journal = {Journal of Materials Science: Materials in Medicine},
keywords = {Association reactions; Bearings (machine parts); Bending tests; Bone cement; Brittle fracture; Defects; Fracture; Fracture mechanics; Free radical reactions; Hardening; Hydration; Kinetics; Polymers; Scanning electron microscopy; Setting; Shear thinning 2-hydroxyethylmethacrylate; Calcium deficient hydroxyapatite; Four-point bending test; Hydration kinetics; Mechanical performance; Mechanical treatments; Tri-calcium phosphates; Tricalcium phosphate cement},
month = {Jan},
pages = {1-13},
peerreviewed = {unknown},
title = {{Reaction} kinetics of dual setting α-tricalcium phosphate cements},
volume = {27},
year = {2016}
}
@article{faucris.239065136,
abstract = {Systematic investigation of filtrates and filter residues resulting from a 24 h treatment of metakaolin in different alkaline solutions were performed. On filtered metakaolin particles, inductively coupled plasma-optical emission spectrometry (ICP-OES) measurements reveal an enrichment of iron and titanium, which suggests an inhomogeneous distribution of these cations. Since the SiO2/Al2O3 ratio remains constant in all filter residues examined, the dissolution of the Si and Al monomers is congruent. Structural differences, identified by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) as a consequence of alkali uptake, influence the X-ray scattering contribution of metakaolin, and thus quantifications with the partial or no known crystal structure (PONKCS) method. This leads to deviations between the degree of reaction calculated from Si and Al solubility from filtrate and that quantified by quantitative powder X-ray diffraction (QPXRD) using the filter residue. Nevertheless, the described changes do not cause a shift in the X-ray amorphous hump in case of congruent dissolution, and thus allow the quantification of the metakaolin before and after dissolution with the same hkl-phase model.},
author = {Scherb, Sebastian and Köberl, Mathias and Beuntner, Nancy and Thienel, Karl Christian and Neubauer, Jürgen},
doi = {10.3390/ma13102214},
faupublication = {yes},
journal = {Materials},
keywords = {Alkaline solution; Calcined clay; Degree of reaction; Metakaolin; PONKCS; Supplementary cementitious material},
note = {CRIS-Team Scopus Importer:2020-06-05},
peerreviewed = {Yes},
title = {{Reactivity} of metakaolin in alkaline environment: {Correlation} of results from dissolution experiments with {XRD} quantifications},
volume = {13},
year = {2020}
}
@article{faucris.111500664,
abstract = {A revised structure model of ettringite is presented, in order to provide quantitative X-ray diffraction (QXRD) of this mineral in cement pastes. The model is derived from two different existing structure models, both of which are suitable for restricted use but are inferior to the refined ettringite structure presented. In the first published ettringite structure proposed by Moore and Taylor [Acta Crystallogr. B 26, 386-393 (1970)], none of the 128 positions for H are given in the unit cell, which results in reduced scattering power for use of this model for quantification purposes. For the precise quantification of ettringite in samples together with anhydrous phases, the scattering factors of all atoms including the H positions are indispensable. The revised structure model is based on the data of Moore and Taylor, supplemented by the H positions determined by Berliner (Material Science of Concrete Special Volume, The Sydney Diamond Symposium, American Ceramic, Society, 1998, pp. 127-141) on the basis of a neutron diffraction structural investigation of deuterated ettringite at 20 K. Berliner's (Material Science of Concrete Special Volume, The Sydney Diamond Symposium, American Ceramic Society, 1998, pp. 127-141) thermal parameter should not, however, be used, since a normal application is at room temperature. In order further to improve the structure model of ettringite, Rietveld refinement with the rigid body approach for OH and H2 O molecules and SO4 tetrahedra was employed. The refined and improved ettringite structure model was tested for quantitative phase analysis by the determination of actual ettringite contents in mixtures with an internal standard. Synthesized and orientation-free prepared ettringite powders were investigated by X-ray powder diffraction analysis and quantified in four different blends with zircon. The quantification results with the new structure model demonstrate the superior quality of the revised ettringite structure. © 2006 International Centre for Diffraction Dat},
author = {Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1154/1.2146207},
faupublication = {yes},
journal = {Powder Diffraction},
keywords = {Cement hydration; Ettringite; Quantitative X-ray powder diffraction analysis (QXRPD); Rietveld refinement; Structure},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.refine},
pages = {4-11},
peerreviewed = {Yes},
title = {{Refined} ettringite ({Ca6Al2}({SO4})3({OH}){12x26H2O}) structure for quantitative {X}-{Ray} diffraction analysis},
volume = {21},
year = {2006}
}
@article{faucris.117077664,
abstract = {The phase relations in the Fe-rich part of the pseudo-binary system SrO–Fe2O3 (>33 mol% Fe2O3) were reinvestigated between 800 and 1500 °C in air. A combination of microscopy, electron probe micro-analysis, powder X-ray diffraction and thermal analysis was used to determine phase relations, crystal structure parameters and phase transition temperatures. M-type hexagonal ferrite SrFe12O19 (85.71 mol% Fe2O3) is stable up to 1410 °C. No indication of a significant phase width was found; Sr4Fe6O13±δ appears as a second phase in compositions with <85.71±0.2 mol% Fe2O3. Sr4Fe6O13±δ itself is stable between 800 and 1250 °C. Two other hexagonal ferrites were found to exist at high temperatures only: W-type SrFe2+2Fe3+16O27 is stable between 1350 and 1440 °C and X-type ferrite Sr2Fe2+2Fe3+28O46 between 1350 and 1420 °C, respectively, which is shown here for the first time. These findings in combination with previously published data were used to derive a corrected phase diagram of the Fe-rich part of the pseudo-binary system SrO–Fe2O3.},
author = {Langhof, Nico and Seifert, Daniela and Göbbels, Matthias and Toepfer, Joerg},
doi = {10.1016/j.jssc.2009.05.039},
faupublication = {yes},
journal = {Journal of Solid State Chemistry},
keywords = {Hexagonal ferrites; Hard magnets; Phase diagram; Sr–Fe–O},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.reinve},
pages = {2409-2416},
peerreviewed = {Yes},
title = {{Reinvestigation} of the {Fe}-rich part of the pseudo-binary system {SrO}-{Fe{\_}2{\_}O{\_}3{\_}}},
volume = {182},
year = {2009}
}
@article{faucris.227311649,
abstract = {In order to gain a deeper understanding of the rheological development of hydrating ordinary Portland cement (OPC) pastes at initial state, and to better understand their underlying processes, quantitative X-ray diffraction (XRD) analysis and rheological measurements were conducted and their results combined. The time-dependent relation between phase development and flow behavior of cement paste was investigated at two different temperatures (20 and 30 °C), over a period of two hours. Regarding the phase development during hydration, ettringite precipitation was identified as the dominant reaction in the first two hours. For both temperatures, the increasing ettringite content turned out to correlate very well with the loss of workability of the reacting cement paste. An exponential relationship between ettringite growth and flow behavior was observed that could be explained by applying the Krieger-Dougherty equation, which describes the influence of solid fraction on the viscosity of a suspension.},
author = {Jakob, Cordula and Jansen, Daniel and Ukrainczyk, Neven and Koenders, Eddie and Pott, Ursula and Stephan, Dietmar and Neubauer, Jürgen},
doi = {10.3390/ma12182957},
faupublication = {yes},
journal = {Materials},
keywords = {Ettringite formation; Hydration kinetics; Modeling; OPC; Rheology; Scanning electron microscopy (SEM); Temperature},
note = {CRIS-Team Scopus Importer:2019-10-01},
peerreviewed = {Yes},
title = {{Relating} ettringite formation and rheological changes during the initial cement hydration: {A} comparative study applying {XRD} analysis, rheological measurements and modeling},
volume = {12},
year = {2019}
}
@article{faucris.265309570,
abstract = {
The scope of this research is to investigate the performance evolution of five ternary CSA-OPC-Cs systems. Time resolved thermodynamic modeling was employed to gain insight into changes in the volume fractions of
the hydrating pastes and link these changes to trends in the pore size distributions of the mortars. Pore solution analyses were performed to investigate which hydrates have the
potential to exert high crystallization pressures. In three out of five
blends the resulting tensile stress exceeded the tensile strength of the materials, resulting in the occurrence of coarse pores, which could be linked to the measured compressive strengths. Two damaging crystallization processes were identified in the investigated blends. One is the continuous precipitation of ettringite at high supersaturation in a system with high anhydrite addition. The other is the delayed crystallization of straetlingite at
high supersaturation and crystallization pressure in the confined
environment of mature pastes.
},
author = {Wolf, Julian and Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2021.106496},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium sulfoaluminate cement; Crystallization pressure; Pore size distribution; Portland cement; Strätlingite},
note = {CRIS-Team Scopus Importer:2021-06-18},
peerreviewed = {Yes},
title = {{Relating} phase transitions to pore size distributions and mechanical mortar properties in {CSA}-{OPC}-{C}$ based systems – {The} potential impact of delayed straetlingite formation},
url = {https://www.sciencedirect.com/science/article/abs/pii/S0008884621001459},
volume = {147},
year = {2021}
}
@article{faucris.264863056,
abstract = {The relationship between fracture toughness and Yttria content in modern zirconia ceramics was revised. For that purpose, we evaluated here 10 modern Y2O3-stabilized zirconia (YSZ) materials currently used in biomedical applications, namely prosthetic and implant dentistry. The most relevant range between 2-5 mol% Y2O3 was addressed by selecting from conventional opaque 3 mol% YSZ up to more translucent compositions (4−5 mol% YSZs). A technical 2YSZ was used to extend the range of our evaluation. The bulk mol% Y2O3 concentration was measured by X-Ray Fluorescence Spectroscopy. Phase quantification by Rietveld refinement considered two tetragonal phases or an additional cubic phase. A first-account of the fracture toughness (KIc) of the pre-sintered blocks is given, which amounted to 0.4 – 0.7 MPa√m. In the fully-densified state, an inverse power-law behavior was obtained between KIc and bulk mol% Y2O3 content, whether using only our measurements or including literature data, challenging some established relationships. A linear relationship between KIc and the fraction of the transformable t-phase was established within the range of 30–70 vol%.},
author = {Belli, Renan and Hurle, Katrin and Schürrlein, Jana and Petschelt, Anselm and Werbach, Katharina and Peterlik, Herwig and Rabe, Torsten and Mieller, Björn and Lohbauer, Ulrich},
doi = {10.1016/j.jeurceramsoc.2021.08.003},
faupublication = {yes},
journal = {Journal of the European Ceramic Society},
keywords = {Dental; Fracture toughness; Power-law; X-ray-diffraction; Yttria; Zirconia},
note = {CRIS-Team Scopus Importer:2021-10-08},
pages = {7771-7782},
peerreviewed = {Yes},
title = {{Relationships} between fracture toughness, {Y2O3} fraction and phases content in modern dental {Yttria}-doped zirconias},
volume = {41},
year = {2021}
}
@article{faucris.116366624,
abstract = {
Oxygen transport of mixed ionic-electronic conductors can be measured by a 'relaxation' technique that permits to investigate the material dynamic properties with oxygen partial pressure change. However, for materials exhibiting higher electronic conductivity than ionic, the time for conductivity change is controlled by bulk ionic transport and any surface reaction can be neglected. By fitting the experimental relaxation data of CaTi 0.7Fe0.3O3-δ composition, the oxidation and reduction kinetics was found to be independent on oxygen partial pressure (PO2) and the rate constants were derived therefrom. From a relaxation experiment at a single PO2 we therefore obtain both the electronic and ionic contributions to the total conductivity as well as the chemical diffusion coefficient.
},
author = {Mashkina, Elena and Baier, Markus and Magerl, Andreas and Göbbels, Matthias and Seifert, Friedrich},
faupublication = {yes},
journal = {Ionics},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.resist},
pages = {269-274},
peerreviewed = {Yes},
title = {{Resistivity} relaxation, a new approach to study ionic mobility in perovskite mixed conductors like {CaTi0}.{7Fe0}.{3O3}-ð},
volume = {11},
year = {2005}
}
@article{faucris.112008864,
abstract = {The structure of two different Mg-substituted biphasic (HAP and β-TCP) mixtures along with the biphasic mixtures without substituted Mg2+ was investigated using Rietveld refinement technique. The substituted Mg 2+ was found in the β-TCP phase and its influence on the composition has led to an increase in HAP content of Mg-containing biphasic mixtures when compared with the HAP content detected in pure biphasic mixtures. The refined structural parameters of Ca10(PO4) 6(OH)2 and β-Ca3(PO4) 2 confirmed that all the investigated compositions have crystallized in the corresponding hexagonal (space group P63/m) and rhombohedral (space group R3c) structures. The substitution of lower sized magnesium was found preferentially incorporated at the sixfold-coordinated Ca (5) site of β-TCP, which is due to the strong Ca (5)·O interaction among all the five different Ca sites of β-Ca3(PO4)2. The in vitro tests using primary culture of osteoblasts showed that all the tested samples are biocompatible and promising materials for in vivo studies. © 2008 Wiley Periodicals, Inc.},
author = {Kannan, Sanjeevi and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Rebelo, Avito and Valério, Patrícia and da Fonte Ferreira, José Maria},
doi = {10.1002/jbm.b.31299},
faupublication = {yes},
journal = {Journal of Biomedical Materials Research Part B-Applied Biomaterials},
keywords = {β-tricalcium phosphate; Biphasic mixtures; Hydroxyapatite; In vitro tests; Magnesium; Rietveld},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.rietve},
pages = {404-411},
peerreviewed = {Yes},
title = {{Rietveld} structure and in vitro analysis on the influence of {Magnesium} in {Biphasic} ({Hydroxyapatite} and beta-{Tricalcium} phosphate) mixtures},
volume = {90},
year = {2009}
}
@inproceedings{faucris.115702444,
author = {Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.rntgen},
pages = {64},
peerreviewed = {Yes},
title = {{Röntgenographische} {Phasenanalyse} von eisenreichen {Tonerdezementklinkern}},
year = {2000}
}
@article{faucris.201061285,
abstract = {Body size changes have been reported across
crisis intervals. Belemnites – now considered extinct stem-decabrachians
– have rarely been investigated for this purpose, and the few studies
have resulted in ambiguous outcomes. Here we investigate two Toarcian
belemnite accumulations in southern Germany from a morphometric point of
view with the support of computed tomography data. The aim of this
study is to test whether a difference in size can be observed between
the rostra of the two studied samples, from individual lineage to
community, and which proxy is more reliable. A significant decrease in
median size from the Early Toarcian (Dactylioceras tenuicostatum Zone) to the Middle Toarcian (Haugia variabilis
Zone) is recognized. This is observed at the community level of
organization, considering the whole assemblage, but also within Passaloteuthis–Acrocoelites
lineage, at the genus level. It is also demonstrated that
diameter-based measurements or maximum preserved length are not reliable
proxies for size, and therefore apical length or three-dimensional
approximations, such as the geometric mean or the post-phragmocone
volume, are more advisable. This is especially important when comparing
specimens with markedly different rostrum shapes. Further studies are,
however, still necessary to disentangle the mechanisms behind the
reduction in rostrum size within the Toarcian and their putative
environmental cause},
author = {Costa Rita, Patrícia and de Baets, Kenneth and Schlott, Martina},
doi = {10.5194/fr-21-171-2018},
faupublication = {yes},
journal = {FOSSIL RECORD},
pages = {171-182},
peerreviewed = {Yes},
title = {{Rostrum} size differences between {Toarcian} belemnite battlefields},
volume = {21},
year = {2018}
}
@article{faucris.109116084,
abstract = {In this study, the application of (an)isotropic size determination using a recently proposed model for the double-Voigt approach is demonstrated and validated against line profile simulations using the Whole Powder Pattern Modelling approach. The fitting of simulated line profiles demonstrates that the attained crystallite sizes and morphologies are in very reasonable agreement with the simulated values and thus demonstrate that even in routine application scenarios credible size and morphology information can be obtained using the double-Voigt approximation. The aim of this contribution is to provide a comprehensive introduction to the problem, address the practical application of the developed model, and discuss the accuracy of the double-Voigt approach and derived size parameters. Mathematical formulations for the visualization of modeled morphologies, supporting the application of the recently developed macros, are additionally provide},
author = {Ectors, Dominique and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1017/S0885715617000070},
faupublication = {yes},
journal = {Powder Diffraction},
keywords = {anisotropic crystallite size; double-Voigt; Rietveld; size–strain; TOPAS},
pages = {1-8},
peerreviewed = {unknown},
title = {{Routine} (an)isotropic crystallite size analysis in the double-{Voigt} approximation done right?},
volume = {32},
year = {2017}
}
@article{faucris.270673265,
abstract = {Sepsis is a dysregulated host response of severe bloodstream infections, and given its frequency of occurrence and high mortality rate, therapeutic improvements are imperative. A reliable biomimetic strategy for the targeting and separation of bacterial pathogens in bloodstream infections involves the use of the broad-spectrum binding motif of human GP-340, a pattern-recognition receptor of the scavenger receptor cysteine rich (SRCR) superfamily that is expressed on epithelial surfaces but not found in blood. Here we show that these peptides, when conjugated to superparamagnetic iron oxide nanoparticles (SPIONs), can separate various bacterial endotoxins and intact microbes (E. coli, S. aureus, P. aeruginosa and S. marcescens) with high efficiency, especially at low and thus clinically relevant concentrations. This is accompanied by a subsequent strong depletion in cytokine release (TNF, IL-6, IL-1β, Il-10 and IFN-γ), which could have a direct therapeutic impact since escalating immune responses complicates severe bloodstream infections and sepsis courses. SPIONs are coated with aminoalkylsilane and capture peptides are orthogonally ligated to this surface. The particles behave fully cyto- and hemocompatible and do not interfere with host structures. Thus, this approach additionally aims to dramatically reduce diagnostic times for patients with suspected bloodstream infections and accelerate targeted antibiotic therapy. Statement of significance: Sepsis is often associated with excessive release of cytokines. This aspect and slow diagnostic procedures are the major therapeutic obstacles. The use of magnetic particles conjugated with small peptides derived from the binding motif of a broad-spectrum mucosal pathogen recognition protein GP-340 provides a highly efficient scavenging platform. These peptides are not found in blood and therefore are not subject to inhibitory mechanisms like in other concepts (mannose binding lectine, aptamers, antibodies). In this work, data are shown on the broad bacterial binding spectrum, highly efficient toxin depletion, which directly reduces the release of cytokines. Host cells are not affected and antibiotics not adsorbed. The particle bound microbes can be recultured without restriction and thus be used directly for diagnostics.},
author = {Friedrich, Bernhard and Lyer, Stefan and Janko, Christina and Unterweger, Harald and Brox, Regine and Cunningham, Sarah and Dutz, Silvio and Taccardi, Nicola and Bikker, Floris J. and Hurle, Katrin and Sebald, Heidi and Lenz, Malte and Spiecker, Erdmann and Fester, Lars and Hackstein, Holger and Strauss, Richard and Boccaccini, Aldo R. and Bogdan, Christian and Alexiou, Christoph and Tietze, Rainer},
doi = {10.1016/j.actbio.2022.01.001},
faupublication = {yes},
journal = {Acta Biomaterialia},
keywords = {GP-340; Magnetic nanoparticles; Pathogen binding; Sepsis; SRCR domain},
note = {CRIS-Team Scopus Importer:2022-03-11},
pages = {418-428},
peerreviewed = {Yes},
title = {{Scavenging} of bacteria or bacterial products by magnetic particles functionalized with a broad-spectrum pathogen recognition receptor motif offers diagnostic and therapeutic applications},
volume = {141},
year = {2022}
}
@article{faucris.222690203,
abstract = {A calcium deficient hydroxyapatite (CDHA) forming cement with a bimodal grain size distribution, composed of α-TCP and fine grained CDHA at a weight ratio of 9:1, was modified by the addition of sodium phytate (IP6) in variable amounts ranging from 0.25 to 2 wt.%, related to the powder content. The injectability of the cement paste was drastically increased by the IP6 addition, independent of the amount of added IP6. Additionally, the cement paste viscosity during the first minutes decreased. These effects could be clearly related to a slightly more negative zeta potential. Furthermore, IP6 was shown to strongly retard the setting reaction, as can be seen both in the calorimetry and X-ray diffraction measurements. In addition, octacalcium phosphate (OCP) was identified as a further setting product. All measurements were performed at 23 °C and 37 °C to assess the effect of temperature on the setting reaction for both clinical handling by the surgeon and the final hardening in the bone defect.},
author = {Weichhold, Jan and Gbureck, Uwe and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin},
doi = {10.3390/ma12132098},
faupublication = {yes},
journal = {Materials},
keywords = {Calcium phosphate cement; In-situ XRD; Injectability; Phytic acid; Rheology},
note = {CRIS-Team Scopus Importer:2019-07-19},
peerreviewed = {Yes},
title = {{Setting} mechanism of a {CDHA} forming α-{TCP} cement modified with sodium phytate for improved injectability},
volume = {12},
year = {2019}
}
@article{faucris.239069138,
abstract = {For bioactive biomaterials such as bioceramics and bioglass, it is generally accepted that, apart from acting as heterogeneous nucleators, it is their solubility and the resulting release of relevant ions such as calcium or basic anions which mainly governs the biomaterial's bioactivity. This contribution reveals that this bioactivity, as assessed by simulated body fluid (SBF), can also be considerably modified by the bioceramic's morphology, i.e., bioactivity is also governed by microstructure and surface morphology. When crystals are forced to adopt out-of-equilibrium crystal habit, this simple change in morphology converts an essentially bioinert material, here calcite, into a bioceramic which shows bioactivity in SBF. On larger length scales, already simple morphological changes, such as scratches, can have inverse effects. Limited mass transport into grooves and pits on a bioceramic surface can lead to local ion depletion which, in turn, causes reduced bioactivity of bioceramics which, otherwise, show distinct bioactivity in SBF. This contribution emblematically illustrates the unforeseen importance of even minor morphology changes on different length scales when assessing and designing a biomaterial's bioactivity through SBF assays.},
author = {Myszka, Barbara and Schodder, Philipp and Leupold, Simon and Barr, Maissa and Hurle, Katrin and Schüßler, Martina and Demmert, Benedikt and Biggemann, Jonas and Fey, Tobias and Boccaccini, Aldo R. and Wolf, Stephan},
doi = {10.1002/adem.202000044},
faupublication = {yes},
journal = {Advanced Engineering Materials},
keywords = {bioactivity; bioceramics; biomaterials; calcium carbonate; crystallization},
note = {CRIS-Team Scopus Importer:2020-06-05},
peerreviewed = {Yes},
title = {{Shape} {Matters}: {Crystal} {Morphology} and {Surface} {Topography} {Alter} {Bioactivity} of {Bioceramics} in {Simulated} {Body} {Fluid}},
year = {2020}
}
@inproceedings{faucris.121384384,
address = {Düsseldorf},
author = {Göbbels, Matthias and Schmid, Markus},
booktitle = {Stahl & Eisen Special: Refractories for Metallurgy},
date = {2006-11-07/2006-11-08},
faupublication = {yes},
isbn = {3514007306},
note = {UnivIS-Import:2015-04-16:Pub.2006.nat.dgeo.IGM.LM.slagin},
pages = {60},
peerreviewed = {unknown},
publisher = {Verlag Stahleisen},
title = {{Slag} infiltration in refractories employing a crystal growth method with thermal gradient},
venue = {Aachen},
year = {2006}
}
@article{faucris.119709084,
author = {Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {Neues Jahrbuch für Mineralogie-Abhandlungen},
note = {UnivIS-Import:2015-03-05:Pub.1995.nat.dgeo.IGM.LM.solids},
pages = {237-258},
peerreviewed = {Yes},
title = {{Solid} solution series of silico-sulphate-chloride-apatites},
volume = {168},
year = {1995}
}
@article{faucris.278500023,
abstract = {The structure and solubility of hydrothermally prepared 11 Å Al-tobermorite with Al/(Al + Si) = 0.1 has been studied. NMR and FTIR data indicated the formation of a cross-linked, well crystalline 11 Å Al-tobermorite and preferential uptake of Al in the branching sites of the silicate chains. The incorporation of Al in branching sites of 11 Å tobermorite increased the basal spacing of the 11 Å Al-tobermorite by ~0.18 Å. Solubility experiments indicated little effect of temperature on the solubility of 11 Å Al-tobermorite and a weak stabilization of 11 Å Al-tobermorite with regard to 11 Å tobermorite. The experimental data confirmed the strong similarity in structure, Al-uptake, and solubility with poorly ordered C-A-S-H gel, although C-A-S-H gels showed a lower degree of ordering, the absence of cross-linking, an increased basal spacing, and a higher solubility.},
author = {Lothenbach, B. and Jansen, Daniel and Yan, Y. and Schreiner, Jürgen},
doi = {10.1016/j.cemconres.2022.106871},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Al-tobermorite; NMR, FTIR Raman spectroscopy; Solubility; Thermodynamic data; XRD},
note = {CRIS-Team Scopus Importer:2022-07-22},
peerreviewed = {Yes},
title = {{Solubility} and characterization of synthesized 11 {Å} {Al}-tobermorite},
volume = {159},
year = {2022}
}
@article{faucris.119618224,
author = {Schleier, Markus and Hermannsdörfer, Ralf and Rohn, Joachim},
doi = {10.4408/IJEGE.2013-06.B-47},
faupublication = {yes},
journal = {Italian Journal of Engineering Geology and Environment},
keywords = {Morphological analyses; Multiple landslide deposits; Palaeo-environmental conditions; Rock avalanche; Western norway},
pages = {493-505},
peerreviewed = {unknown},
title = {{Spatial} distribution of rockslide deposits and their morphological features suggest timing and palaeo-environmental conditions for rock slope failures in innerdalen and innfjorddalen, møre og romsdal county, {Western} {Norway}},
volume = {2013},
year = {2013}
}
@article{faucris.121063624,
abstract = {The development of the crystalline microstructure of a hydrating self-leveling compound (SLC) was analyzed using a two-dimensional XRD (GADDS). The application of non-destructive micro-diffraction with the GADDS, combined with a custom-made sample holder, made it possible to carry out position-sensitive in-situ measurements of a Calcium-Aluminate-Cement-(CAC)- dominated SLC. Different substrates were used in the measurement procedures so as to acquire data regarding the influence of the properties of the ground surface on the process of hydration. The results show that the crystalline microstructure is strongly affected by the availability of free water. The strongly vertically-fluctuating water-content of the hydrating mortar, which is mainly influenced by outside conditions, has a very significant effect upon the resulting ettringite content. This fact is also reflected in the resulting microstructure of the cured SLC. © 2012 Elsevier Ltd. All rights reserved.},
author = {Seifert, Severin and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2012.03.012},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium Aluminate Cement (D); Hydration (A); Microstructure (B); Mortar (E); X-ray diffraction (B)},
note = {UnivIS-Import:2015-04-14:Pub.2012.nat.dgeo.IGM.LM.spatia},
pages = {919-927},
peerreviewed = {Yes},
title = {{Spatially} resolved quantitative in-situ phase analysis of a self-leveling compound},
volume = {42},
year = {2012}
}
@article{faucris.124146044,
author = {Pöllmann, Herbert and Stemmermann, Peter and Neubauer, Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1991.nat.dgeo.IGM.LM.speich},
pages = {215},
peerreviewed = {Yes},
title = {{Speicherminerale} mit {Ellestadit}, {Nasonit}, {Ganomalit} und {Silicocarnotit} {Struktur}},
year = {1991}
}
@article{faucris.114503884,
abstract = {We introduce a new approach for tracing the origin submerged entry nozzle precipitates (clogging) in continuous casting processes using stable oxygen isotopes. The isotopic signatures of possible oxygen sources are compared with the isotope ratios in the precipitates. We use infra-red laser fluorination in combination with continuous flow gas mass spectroscopy to determine the oxygen ratios in the highly refractory, alumina-rich precipitates and possible oxygen sources. Our isotope data indicate that atmospheric oxygen is not the major source of oxide precipitates in the submerged entry nozzles. Also process oxygen from the converter can be excluded to be source of oxygen in clogging. A possible origin of oxygen in alumina-rich precipitates from olivine from refractory material is discussed. © 2005 E. Schweizerbart'sche Verlagsbuchhandlun},
author = {Göbbels, Matthias and Pack, Andreas and Hoernes, Stephan and Bross, Rainer and Buhr, Andreas},
doi = {10.1127/0935-1221/2005/0017-0483},
faupublication = {yes},
journal = {European Journal of Mineralogy},
keywords = {Continuous casting; Non-metallic inclusions; Oxygen isotopes},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.stable},
pages = {483-493},
peerreviewed = {Yes},
title = {{Stable} oxygen isotopes - {A} new approach for tracing the origin of oxide inclusions in steels},
volume = {17},
year = {2005}
}
@article{faucris.316105324,
abstract = {Recently, a hydrous carbonate-containing brucite (HCB) with an approximate composition of MgCO3·35 Mg(OH)2·H2O was postulated as hydration product of binders based on mixtures of reactive magnesia and hydromagnesite (Mg5(CO3)4(OH)2·4H2O). X-ray diffraction showed that the 001 reflection of this phase was split into two reflections at 20 °C, whereas at 60 °C only one reflection occurred. Rietveld refinement revealed that the X-ray pattern of the HCB-phase could be fitted well when a random displacement (stacking faults) and a movement of the layers in x, y and z direction were allowed. The presence of water and/or carbonate leads to different distances between the layers, thus causing the splitting of the 001 reflection. At 60 °C, only carbonate is included in the brucite structure, leading to a similar distance between all brucite layers. The assignment of the additional reflection appearing at 20 °C to a separate, unknown hydrated magnesium carbonate, as suggested in earlier studies, can be excluded.},
author = {Jansen, Daniel and German, Alexander and Ectors, Dominique and Winnefeld, Frank},
doi = {10.1016/j.cemconres.2023.107371},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Brucite; Hydromagnesite; Low-CO; Magnesium carbonate cements; Mineral carbonation},
month = {Jan},
note = {CRIS-Team Scopus Importer:2024-01-05},
peerreviewed = {Yes},
title = {{Stacking} faults of the hydrous carbonate-containing brucite ({HCB}) phase in hydrated magnesium carbonate cements},
volume = {175},
year = {2024}
}
@article{faucris.119128504,
author = {Göbbels, Matthias},
faupublication = {yes},
journal = {Zeitschrift für Kristallographie, Supplement},
note = {UnivIS-Import:2015-03-05:Pub.1997.nat.dgeo.IGM.LM.stapel},
pages = {47},
peerreviewed = {unknown},
title = {{Stapelungsstrukturen} von {Verbindungen} der beta-{Tonerde}- und {Magnetoplumbit}-{Familien} - {Ansatz} einer strukturellen {Systematik}},
volume = {Issue No.12},
year = {1997}
}
@article{faucris.288730404,
abstract = {Crustose coralline algae (CCA) occur from the tropics to the poles in
photic benthic environments. Here, we report on some of the world’s
southernmost and coldest CCA sites in Terra Nova, Ross Sea, Antarctica
at 74°41′ S. The recently described red alga Tethysphytum antarticum
is investigated for its skeletal architecture, its mineralogical and
geochemical composition, as well as for its taxonomic classification. A
phylogenetic analysis based on molecular genetics and the sequencing of
the photosystem II protein D1 (psbA) gave a perfect match with T. antarcticum.
Histological sections and micro-CT-scans provide new diagnostic details
for the conceptacles (the reproductive organs of the alga). X-ray
diffractometry and electron-microprobe measurements yielded a clear
high-Mg calcite (~8 mol%) composition of the skeletal parts. Detailed
back-scattered electron imaging of polished petrographic thin sections
revealed a two-layered thallus (vegetative plant tissue), comprising an
organic-rich irregularly calcified basal layer with rectangular cells,
overlain by the main thallus. Elemental maps show relatively increased
sulphur in the basal layer, clearly tied to organic cell walls. MgCO3 and SrCO3
were targeted with semiquantitative elemental mappings and in an
ontogenetic quantitative spot transect. Compared with temperature (−1.95
°C to +1.08 °C), the MgCO3 (mol%) reflects this world’s coldest CCA site temperature with the lowest MgCO3 content of 7.9 ± 1.6 mol%. The along transect variability, however, shows with ~6 mol% a larger MgCO3
variability than expected for the 3 °C intra-annual temperature
amplitude in Terra Nova Bay. This implies that in low amplitude settings
the biomineralisation control on Mg/Ca ratios can outcompete its
temperature sensitivity. Mark-recapture studies, next to the
environmental logger station La Zecca are suggested, to perform a
detailed growth rate and biomineralisation quantificatio},
author = {López Correa, Matthias and Teichert, Sebastian and Ragazzola, Federica and Cazorla Vázquez, Salvador and Engel, Felix and Hurle, Katrin and Mazzoli, Claudio and Kuklinski, Piotr and Raiteri, Giancarlo and Lombardi, Chiara},
doi = {10.3390/min13020215},
faupublication = {yes},
journal = {Minerals},
keywords = {crustose coralline algae; Antarctica; taxonomy; phylogeny; thallus structure; biomineralization; geochemistry; climate change},
peerreviewed = {Yes},
title = {{Structural} and geochemical assessment of the coralline alga {Tethysphytum} antarcticum from {Terra} {Nova} {Bay}, {Ross} {Sea}, {Antarctica}},
volume = {13},
year = {2023}
}
@inproceedings{faucris.119898724,
author = {Müller, Ralf and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2001.nat.dgeo.IGM.LM.struct},
pages = {131},
peerreviewed = {Yes},
title = {{Structural} investigations of selected phases in the system {Ca2SiO4} * {Ca3}({PO4})2 using {XRPD} and {Rietveld} method},
volume = {Vol. 13},
year = {2001}
}
@article{faucris.113216444,
abstract = {In this study, we resolved discrepancies concerning the experimentally determined structure of benzamide molecular crystals from dispersion-corrected density functional calculations. A clear energy ranking was obtained for the two candidates of the stable (P1) modification of benzamide. This was rationalised by subtle differences of the molecular interactions in the molecular crystal. The potential energy of the different structures was dominated by the interplay of intermolecular attraction and molecular torsion/deformation to accommodate favourable hydrogen-bonded networks. Using suitable proxies arranged in pseudo-crystalline set-ups, we discriminated the contribution of electrostatics, π-π interactions and intra-molecular interactions to the lattice energies. © 2013 Taylor and Francis.},
author = {Ectors, Philipp and Ectors, Dominique and Zahn, Dirk},
doi = {10.1080/08927022.2013.794274},
faupublication = {yes},
journal = {Molecular Simulation},
keywords = {crystal structure; density-functional theory calculations; molecular interactions; polymorphism},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.struct},
pages = {1079-1083},
peerreviewed = {Yes},
title = {{Structure} and interactions in benzamide molecular crystals},
volume = {39},
year = {2013}
}
@article{faucris.262058494,
abstract = {This paper is about the general structure and the formation of oxidic hexaphase types according to their crystal chemistry. Oxidic hexaphases exhibit hexagonal symmetry and consist of mixed layer structures stacked along the crystallographic c-axis. There are two main types of hexaphases: the magnetoplumbite and β-alumina type. Every hexaphase has a spinel structure that integrates blocks with either a rock salt or β-alumina structure. Both block types contain a characteristic cation. The formation of oxidic hexaphases depends on various factors: In addition to the size and charge of the characteristic cation the size of the spinel block in the crystallographic a-b direction is a decisive factor. Furthermore, the spinel block can be modified by replacing the present trivalent scaffolding cations with bivalent cations, resulting in more complex hexaphases such as the X, W, Z and Y types or β‴ types.},
author = {Klemenz, Lisa and Richter, Andreas and Langhof, Nico and Göbbels, Matthias},
doi = {10.1016/j.oceram.2021.100142},
faupublication = {yes},
journal = {Open Ceramics},
keywords = {Beta-alumina; Hexaaluminates; Magnetoplumbite; Mixed layer; Stacking},
note = {CRIS-Team Scopus Importer:2021-07-02},
peerreviewed = {Yes},
title = {{Structure} and principles of oxidic hexaphases: {A} review},
volume = {7},
year = {2021}
}
@article{faucris.107298664,
abstract = {Two modifications of ye'elimite (namely orthorhombic ye'elimite (stoichiometric CA$) and iron-containing cubic ye'elimite (CAF$)) were synthesized and the reactions without additional sulfate and with gypsum were tracked by means of heat flow calorimetry. Without gypsum the reaction differs significantly for both modifications while the addition of gypsum leads to almost comparable reactions. With addition of gypsum two distinct heat flow maxima could be detected while the reaction without gypsum showed only one distinct maximum for both modifications. For the systems with gypsum additional experiments were performed namely in-situ XRD, NMR, thermodynamic modeling, TGA and pore solution composition. It could be shown that the reaction with gypsum shows two steps of ettringite precipitation for both modifications. The two steps show significant differences. During the first step of ettringite precipitation gypsum and ye'elimite and free water are consumed forming ettringite and a highly hydrated AH. The second ettringite precipitation is powered by ye'elimite consumption but no further gypsum dissolution. In addition, water is removed from the AH used up for the second ettringite precipitation. The two modifications of ye'elimite react comparable with gypsum but show slightly different heats of hydration when reacting with the same calcium sulfate (gypsum) during early hydration; this is due to slightly lower reaction turnover of the cubic, iron-containing modification leading to slightly reduced ettringite formatio},
author = {Jansen, Daniel and Spies, Alexandra and Neubauer, Jürgen and Ectors, Dominique and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2016.11.009},
faupublication = {yes},
journal = {Cement and Concrete Research},
month = {Jan},
pages = {106-116},
peerreviewed = {Yes},
title = {{Studies} on the early hydration of two modifications of ye'elimite with gypsum},
volume = {91},
year = {2017}
}
@article{faucris.107299544,
abstract = {With the presence of CA, the hydration kinetics of ferrite phase is influenced and decreased dramatically. Heat flow measurements, QXRD data, and heat flow calculations show concordantly that hydration of ferrite in mix with CA is retarded until the onset of CA hydration and that less ferrite is dissolved. Analysis of the liquid phase of CA paste and CAC-like cement paste displayed significant higher concentrations of Al and Ca compared with pure ferrite paste. Thus, the composition of the liquid phase is set by initial dissolution of CA. We assume that an instant dissolution of the ferrite phase is blocked when solubility equilibrium is dominated by CA. Dissolution of ferrite is only possible after massive precipitation of hydrates and reduction of Ca and Al concentration in the liquid phase.},
author = {Hertel, Tobias and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2016.01.004},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium aluminate cement(D); Calcium aluminoferrite (D); Calorimetry (A); Pore solution (B); X-ray diffraction (B)},
pages = {79-85},
peerreviewed = {Yes},
title = {{Study} of hydration potential and kinetics of the ferrite phase in iron-rich {CAC}},
volume = {83},
year = {2016}
}
@article{faucris.255360077,
abstract = {The interactions between latex and cement are still not completely understood. In this work, we would like to address the temporal changes in cement hardening and latex film formation. For this reason, the hydration process and the film formation were simultaneously monitored. This scientific issue is even more challenging as a nondestructive quantitative analysis of the film formation process is not available yet. Here, we report on simultaneous monitoring of the latex film formation and the phase development in cementitious systems via 1H-time-domain-NMR for the first time. The obtained results were validated using classical analytical methods, such as in situ X-ray diffraction, X-ray fluorescence (Rietveld analysis), and confocal laser scanning microscopy. },
author = {Jansen, Daniel and Ectors, Dominique and Kong, Xiangming and Schmidtke, Christian and Deschner, Florian and Pakusch, Joachim and Jahns, Ekkehard and Neubauer, Jürgen},
doi = {10.1021/acsomega.0c06010},
faupublication = {yes},
journal = {ACS Omega},
note = {CRIS-Team Scopus Importer:2021-04-16},
peerreviewed = {Yes},
title = {{Synchronous} {Monitoring} of {Cement} {Hydration} and {Polymer} {Film} {Formation} {Using} {1H}-{Time}-{Domain}-{NMR} with {T2Time}-{Weighted} {T1Time} {Evaluation}: {A} {Nondestructive} {Practicable} {Benchtop} {Method}},
year = {2021}
}
@article{faucris.120186484,
author = {Schmid, Markus and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Göbbels, Matthias},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2003.nat.dgeo.IGM.LM.synthe},
pages = {174},
peerreviewed = {Yes},
title = {{Synthese} und {Rietveldverfeinerung} der {Gehlenit}-{Mischkristallreihe}},
volume = {Vol 15},
year = {2003}
}
@article{faucris.115189844,
author = {Neubauer, Jürgen and Oberste-Padtberg, Rüdiger and Pöllmann, Herbert},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1991.nat.dgeo.IGM.LM.synthe},
pages = {196},
peerreviewed = {Yes},
title = {{Synthese} von {Alinit}, {Hauptbestandteil} im {Alinitzement}},
year = {1991}
}
@inproceedings{faucris.119901584,
author = {Kemethmüller, Stefan and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2001.nat.dgeo.IGM.LM.synthe},
pages = {92},
peerreviewed = {Yes},
title = {{Synthese} von {Fe3}+-substitutierten {Tricalciumaluminaten} und {Auswirkungen} auf deren {Hydratationsverhalten}},
volume = {Vol. 13},
year = {2001}
}
@article{faucris.111503524,
author = {Götz-Neunhoeffer, Friedlinde and Enderle, Ralph and Göbbels, Matthias},
faupublication = {yes},
journal = {Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.synthe{\_}2},
pages = {142},
peerreviewed = {No},
title = {{Synthesis} and characterization of cellular apatite-whitlockite composites for bone substitution},
year = {2005}
}
@article{faucris.119555304,
author = {Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {Neues Jahrbuch für Mineralogie-Abhandlungen},
note = {UnivIS-Import:2015-03-05:Pub.1992.nat.dgeo.IGM.LM.synthe},
pages = {295-310},
peerreviewed = {Yes},
title = {{Synthesis} and characterization of chloride bearing silico - sulfate apatite},
volume = {7},
year = {1992}
}
@incollection{faucris.115040904,
address = {Rotterdam},
author = {Götz-Neunhoeffer, Friedlinde and Pöllmann, Herbert},
booktitle = {Applied Mineralogy in Research, Economy, Technology, Ecology and Culture},
editor = {D. Rammlmair et al.},
faupublication = {yes},
isbn = {90 5809 163 5},
keywords = {Angewandte Mineralogie, Applied Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.synthe},
pages = {551-555},
peerreviewed = {Yes},
publisher = {A.A. Balkema},
title = {{Synthesis} and mineralogical characterization of calcium ferrate hydrates and their application as reservoir minerals in waste dumps},
volume = {Vol.2},
year = {2000}
}
@article{faucris.111501544,
author = {Schmid, Markus and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Göbbels, Matthias},
faupublication = {yes},
journal = {Zeitschrift der Deutschen Gesellschaft für Geowissenschaften},
note = {UnivIS-Import:2015-03-09:Pub.2005.nat.dgeo.IGM.LM.synthe},
pages = {337},
peerreviewed = {Yes},
title = {{Synthesis} and {Rietveld} refinement of {Ferri}-{Gehlenite} solid solution series},
year = {2005}
}
@article{faucris.112009304,
abstract = {Zinc substituted β-tricalcium phosphate [β-Ca3(PO 4)2] was formed by substituting a zinc precursor in calcium-deficient apatite through aqueous precipitation technique. Heat treatment at 1000°C led to the formation of well crystalline β-Ca 3(PO4). Refinement technique was used to determine the influence of incorporated zinc in the β-Ca3(PO4) structure. The structural data for all the four different zinc substituted β-Ca3(PO4) ranging from 0-9 mol% of zinc investigated in the present study confirmed the rhombohedral structure of β-Ca 3(PO4) in the hexagonal setting (space group R3c). The incorporation of lower sized Zn2+ (0.745 Å for sixfold coordination with O) at the higher sized Ca2+ (1.00 Å for sixfold coordination with O) site in the β-Ca3(PO4) structure led to the contraction of unit cell parameters. The added zinc prefers to occupy the Ca(5) site of β-Ca3(PO4) structure. © 2009 The American Ceramic Society.},
author = {Kannan, Surekka and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and da Fonte Ferreira, José Maria},
doi = {10.1111/j.1551-2916.2009.03093.x},
faupublication = {yes},
journal = {Journal of the American Ceramic Society},
note = {UnivIS-Import:2015-03-09:Pub.2009.nat.dgeo.IGM.LM.synthe},
pages = {1592-1595},
peerreviewed = {Yes},
title = {{Synthesis} and {Structure} {Refinement} of {Zinc}-{Doped} {Beta}-{Tricalcium} {Phosphate} {Powders}},
volume = {7},
year = {2009}
}
@article{faucris.112215224,
abstract = {The synthesis of five different Sr2+- and Mg2+-co-substituted β-tricalcium phosphate (β-TCP) has been obtained by heating the calcium-deficient apatites above 800 °C. With the investigated concentrations of Sr2+ and Mg2+ from the present study, no additional phases other than β-TCP have been detected. The synthesized powders have been characterized by X-ray diffraction, Fourier transform infrared spectrometry, elemental analysis and Rietveld refinement studies. The co-substitution of Sr2+ and Mg2+ in the β-TCP has resulted in the formation of crystalline β-TCP at hexagonal setting (space group R3c). The reduction of lattice a- and c-axis parameters with the combined substitution of Sr2+ and Mg2+ in the β-TCP has been found evident from the present results. Sr2+ has been found occupying the Ca(1,2,3,4) sites and Mg2+ was found at the sixfold coordinated Ca(5) site of β-TCP structure. © 2009 Acta Materialia Inc.},
author = {Kannan, Surekka and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen and Pina, Sandra and Torres, Paula M. C. and da Fonte Ferreira, José Maria},
doi = {10.1016/j.actbio.2009.08.009},
faupublication = {yes},
journal = {Acta Biomaterialia},
keywords = {β-TCP; Co-substitution; Magnesium; Rietveld refinement; Strontium},
note = {UnivIS-Import:2015-03-09:Pub.2010.nat.dgeo.IGM.LM.synthe},
pages = {571-576},
peerreviewed = {unknown},
title = {{Synthesis} an structural characterization of strontium- and magnesium-co-substituted beta-tricalcium phosphate},
url = {https://www.researchgate.net/publication/247281745{\_}Synthesis{\_}and{\_}Structural{\_}Characterization{\_}of{\_}Strontium{\_}and{\_}Magnesium{\_}Co-Substituted{\_}b-Tricalcium{\_}Phosphate},
volume = {6},
year = {2010}
}
@article{faucris.256886305,
abstract = {In this study, as a measure to enhance the antimicrobial activity of biomaterials, the selenium ions have been substituted into hydroxyapatite (HA) at different concentration levels. To balance the potential cytotoxic effects of selenite ions (SeO32−) in HA, strontium (Sr2+) was co-substituted at the same concentration. Selenium and strontium-substituted hydroxyapatites (Se-Sr-HA) at equal molar ratios of x Se/(Se + P) and x Sr/(Sr + Ca) at (x = 0, 0.01, 0.03, 0.05, 0.1, and 0.2) were synthesized via the wet precipitation route and sintered at 900 °C. The effect of the two-ion concentration on morphology, surface charge, composition, antibacterial ability, and cell viability were studied. Xray diffraction verified the phase purity and confirmed the substitution of selenium and strontium ions. Acellular in vitro bioactivity tests revealed that Se-Sr-HA was highly bioactive compared to pure HA. Se-Sr-HA samples showed excellent antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus carnosus) bacterial strains. In vitro cell–material interaction, using human osteosarcoma cells MG-63 studied by WST-8 assay, showed that Se-HA has a cytotoxic effect; however, the co-substitution of strontium in Se-HA offsets the negative impact of selenium and enhanced the biological properties of HA. Hence, the prepared samples are a suitable choice for antibacterial coatings and bone filler applications.},
author = {Maqbool, Muhammad and Nawaz, Qaisar and Ur Rehman, Muhammad Atiq and Cresswell, Mark and Jackson, Phil and Hurle, Katrin and Detsch, Rainer and Goldmann, Wolfgang and Shah, Asma Tufail and Boccaccini, Aldo R.},
doi = {10.3390/ijms22084246},
faupublication = {yes},
journal = {International Journal of Molecular Sciences},
keywords = {Antibacterial; Co-substituted hydroxyapatite; Cytocompatibility; Selenium; Strontium},
note = {CRIS-Team Scopus Importer:2021-04-30},
peerreviewed = {Yes},
title = {{Synthesis}, characterization, antibacterial properties, and in vitro studies of selenium and strontium co-substituted hydroxyapatite},
volume = {22},
year = {2021}
}
@article{faucris.113235364,
abstract = {A new method of synthesizing spherical nanoparticles with photoluminescent spinel structures using a CO2 laser co-vaporization technique (CoLAVA) is presented. The method applies homogeneous mixtures of oxidic precursors such as Al2O3, SrO and Eu2O 3 and allows the fabrication of quantities exceeding 10 g h -1. During the CoLAVA process, the educt oxides are reacted by a gas phase condensation yielding amorphous spherical particles with diameters ranging from 10 to 100 nm. The as-prepared materials exhibit red emission at 625 nm (1.98 eV) due to the incorporated Eu3+. Temperature treatment up to 1200 C under a reducing atmosphere yielded crystalline particles of the same size, which were slightly sintered. These particles consisted of >90 wt.% SrAl2O4 with minor fractions of Sr3Al 2O6 and SrCO3. The amount of the SrAl 2O4 spinel increased with increasing temperature, whereas the accompanying phases were decreased. A strong green emission centered at 525 nm (2.36 eV) detected at RT was observed at an onset temperature of 900 C, which is due to the presence of Eu2+ in the crystal lattice of SrAl 2O4. The red emission was not observed at higher annealing temperatures. The CoLAVA method represents a fast and facile route for the fabrication of nano- to microstructured phosphor materials for a variety of engineering applications. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.},
author = {Zollfrank, Cordt and Gruber, Sabine and Batentschuk, Miroslaw and Osvet, Andres and Götz-Neunhoeffer, Friedlinde and Dittrich, Sebastian and Grabow, Janet and Kurland, Heinz-Dieter and Müller, Frank A.},
doi = {10.1016/j.actamat.2013.08.010},
faupublication = {yes},
journal = {Acta Materialia},
keywords = {Laser vaporization; Nanoparticles; Photoluminescence},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.synthe},
pages = {7133-7141},
peerreviewed = {Yes},
title = {{Synthesis} of {Eu}-doped {SrAl2O4} nanophosphors by {CO2} laser vaporization},
volume = {61},
year = {2013}
}
@article{faucris.119732624,
abstract = {Alite (CaSiO/CS with low concentrations of foreign ions) is the main constituent of Ordinary Portland Cement. Normally it forms during sintering but with quite low crystal sizes (ca. 30 μm). For experiments on alite hydration behavior monocrystalline grains are required. Due to its incongruent melting behavior and its thermodynamic instability below 1250 °C it is very challenging to obtain large alite single crystals. In the present study, the floating zone method was used for annealing polycrystalline rods of monoclinic and triclinic CS just below the melting point of the phase. Large monocrystalline grains (> 500 μm) of the monoclinic (Al, Mg-doped) and triclinic polymorphs could successfully be obtained. Monocrystallinity was demonstrated by electron backscatter diffraction (EBSD). The chemical composition regarding incorporation of foreign ions and thus the resulting crystallographic modification of the CS can easily be adjusted. Chemical homogeneity of the synthesized monocrystalline grains was proven by electron probe microanalysis (EPMA).},
author = {Naber, Christoph and Götz-Neunhoeffer, Friedlinde and Göbbels, Matthias and Rößler, Christiane and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2016.04.008},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Ca3SiO5 (D); Crystal size (B); Floating zone method; SEM (B)},
pages = {156-162},
peerreviewed = {Yes},
title = {{Synthesis} of monocrystalline {Ca3SiO5} using the optical floating zone method},
volume = {85},
year = {2016}
}
@article{faucris.119024224,
author = {Will, T. M. and Frimmel, H. E. and Zeh, A. and Le Roux, Petrus and Schmädicke, Esther},
doi = {10.1016/j.precamres.2010.03.005},
faupublication = {yes},
journal = {Precambrian Research},
note = {UnivIS-Import:2017-03-24:Pub.2010.nat.dgeo.IGM.profes{\_}1.texton},
pages = {85-112},
peerreviewed = {Yes},
title = {{Tectonic} and crustal evolution of the {Shackleton} {Range}, {East} {Antarctica}: {Geochemical} and isotope contraints},
year = {2010}
}
@article{faucris.265386571,
abstract = {In continuation of earlier work on early hydration, this study evaluates the late hydration of CAC and CaCO3 using QXRD and thermodynamic modelling at different temperatures. Experiments were performed at 5, 23, 40 and 60 °C for up to one year. As stated in the preceding study, C2AHX might act as a precursor for monocarbonate in early hydration, and thus no or only little monocarbonate should form at temperatures below 20 °C. At 5 °C, monocarbonate starts precipitating after 7 d and remains alongside CAH10. At all other investigated temperatures, monocarbonate is the dominant hydrate phase. Primarily formed CAH10 at 23 °C is visible up to 14 d but then becomes unstable with respect to monocarbonate. At 23 °C and 40 °C the thermodynamically stable phase assemblage is reached within one year. However, the precipitation of C3AH6 is detected in all samples at 60 °C, which results from an insufficient w/CAC ratio for carbonate-AFm in the paste due to the inevitable evaporation of mixing water for this condition. However, C3AH6 can partly be “re-converted” at 60 °C when the sample is subsequently stored under water and monocarbonate is stable again.},
author = {Goergens, Julian and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cement.2021.100011},
faupublication = {yes},
journal = {Cement},
keywords = {Hydration (A); Temperature (A); Thermodynamic calculations (B); X-ray diffraction (B); Calcite (D); Calcium aluminate cement (D)},
peerreviewed = {Yes},
title = {{Temperature}-dependent late hydration of calcium aluminate cement in a mix with calcite – {Potential} of {G}-factor quantification combined with {GEMS}-predicted phase content},
volume = {5},
year = {2021}
}
@article{faucris.115606744,
author = {Risch, Alexander and Gäberlein, Peter and Neubauer, Jürgen and Göbbels, Matthias},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1999.nat.dgeo.IGM.LM.textur},
pages = {192},
peerreviewed = {Yes},
title = {{Texture} analysis of ({Bi},{Pb})-2212 in cold isostatic pressed bulk material using the {Rietveld} method},
year = {1999}
}
@article{faucris.201209675,
abstract = {In-situ XRD, heat flow calorimetry, pore water analysis and 1H NMR were used in order to gain more detailed understanding for cement hydration within the first hours of hydration. All methods used show very satisfying accordance. All information gained from the different methods were used in order to calculate absolute mass balance for several ions in order to get an idea about ionic reservoirs adsorbed on surfaces during cement hydration. Sulfate and aluminum adsorption show impact on sulfate depletion, calcium does not.
3A, and the precipitation of ettringite. The contributions made by anhydrite dissolution and gypsum dissolution to the heat released during hydration turned out to be quite small. It is possible to explain, on the basis of the data produced, the origin of the heat flow curve of the cement used.},
author = {Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Lothenbach, Barbara and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2011.09.001},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {X-ray diffraction B; Calorimetry A; Hydration A; Kinetics A; Thermodynamic calculations B},
month = {Jan},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.theear},
pages = {134-138},
peerreviewed = {Yes},
title = {{The} early hydration of {Ordninary} {Portland} {Cement} ({OPC}): {An} approach comparing measured heat flow with calculated heat flow from {QXRD}},
volume = {42},
year = {2011}
}
@article{faucris.286928081,
abstract = {Brushite cements show excellent biocompatibility and are therefore an often-used material for bone repair. However, methods to prevent inflammations after surgery are needed. As Cu2+ was proven to provide antibacterial properties, as well as other application relevant features, it is a promising additive. Concerning these factors, a brushite cement containing Cu2+-doped β-tricalcium phosphate, monocalcium phosphate monohydrate, and phytic acid as setting retarder was investigated with powder and in situ X-ray diffraction, isothermal heat flow calorimetry, in situ 1H-time domain – nuclear magnet resonance, and pore solution analysis. The influence of Cu2+ ions on the hydration kinetics of the brushite cement and the locations of the Cu2+ ions after completion of the hydration were the main questions of interest. Heat flow calorimetry showed a significant retardation and deceleration of the hydration with increasing Cu2+ content in β-tricalcium phosphate. This effect can be directly correlated to the Cu2+ ions, as it was also shown for cements without phytic acid. X-ray diffraction showed brushite as main hydrate phase. Additionally, Cu2+-doped cements formed a hydrate phase not assignable by X-ray diffraction, which is assumed to be Cu2+ containing. Furthermore, Cu2+ was detected in the pore solution after the hydration, and no signs of Cu2+ incorporation in the crystal structure of brushite were found.},
author = {Späth, Karla and Götz-Neunhoeffer, Friedlinde and Hurle, Katrin},
doi = {10.1016/j.mtchem.2022.101288},
faupublication = {yes},
journal = {Materials Today Chemistry},
keywords = {Copper; Heatflow calorimetry; Phytic acid; X-ray diffraction},
month = {Jan},
note = {CRIS-Team Scopus Importer:2022-12-23},
peerreviewed = {Yes},
title = {{The} effect of {Cu2}+ doping in β-tricalcium phosphate on the hydration mechanism of a brushite cement},
volume = {27},
year = {2023}
}
@article{faucris.111782264,
abstract = {X-ray diffraction patterns of hydrating pastes made of calcium aluminate cement with α-calcium sulfate hemihydrate were evaluated to clarify the phase development and its effect on workability. Binder mixtures of this type are used in filler compounds and plasters. The behaviour pattern of the phase formation at 23 °C can be documented in situ with XRD analysis. The results of the normalized quantitative phase analysis of the pastes with a water/solids ratio W/S = 0.5 in combination with the time-dependent data from the heat flow calorimetry have made it possible to develop models for the hydration of calcium aluminate cement in the presence of calcium sulfate, Li2CO3 and tartaric acid. The quantitative phase analysis of the hydration of calcium aluminate cement with calcium sulfate hemihydrate showed that monocalcium aluminate (CA) and calcium sulfate hemihydrate are dissolved and that ettringite and also gypsum can be detected as new formations. The behaviour pattern of the hydration of calcium aluminate cement-calcium sulfate hemihydrate-mixtures is altered by the addition of Li2CO3 solutions as CA accelerators. The rate of reaction of ettringite formation is significantly dependent on the concentration of the Li+. As with pure calcium aluminate cement the formation of an impermeable Al hydroxohydrate layer around the particles of CA in calcium aluminate cement-calcium sulfate hemihydrate-mixtures is also hindered by the effect of Li+ and the availability of aluminium is increased via the lithium aluminium hydrate intermediate compound (LA2H10 where L = Li2O). LA2H10 is a compound of the hydrotalcite type and consists of a main layer [Li2Al4(OH) 12]2+ and an intermediate layer
[(OH) 2•3H2O] 2- but anions, such as CO32-, 2Cl- or 2(NO3-), can also be incorporated in the intermediate layer in place of the hydroxide. The function of the Li2CO3 is confined to the dissolving of the CA and has no influence on the dissolving of the calcium sulfate hemihydrate. The tartaric acid can lead to precipitation of Ca tartrate, which affects the Ca2+ from the dissolving of the CA and of the calcium sulfate hemihydrate and it can also coat the reactive surfaces of the CA and calcium sulfate hemihydrate.
},
author = {Götz-Neunhoeffer, Friedlinde},
faupublication = {yes},
journal = {Cement International},
note = {UnivIS-Import:2015-03-09:Pub.2007.nat.dgeo.IGM.LM.thefun},
pages = {90-101},
peerreviewed = {unknown},
title = {{The} function of {Li} carbonate and tartaric acid in the hydration of mixtures of calcium aluminate cement ({CAC}) with calcium sulfate hemihydrate},
volume = {Vol. 5},
year = {2007}
}
@article{faucris.117386544,
abstract = {The classical external-standard method derived from the work of OConnor & Raven [Powder Diffr. (1988), 3, 2-6] was used to examine the hydration of the major phase, alite, of ordinary Portland cements at different temperatures and different water/alite ratios. In order to estimate the accuracy of the method, heat-flow curves were calculated from the alite dissolution curves obtained from X-ray diffraction in situ experiments. The heat-flow curves calculated in this way were compared with heat-flow curves recorded using a calorimeter. It is shown that the calculated curves agree well with the curves obtained from heat-flow experiments. © 2011 International Union of Crystallography.},
author = {Jansen, Daniel and Bergold, Sebastian and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1107/S0021889811025933},
faupublication = {yes},
journal = {Journal of Applied Crystallography},
keywords = {alite hydration; G-factor method; heat-flow calorimetry; in situ X-ray diffraction analysis},
note = {UnivIS-Import:2015-03-09:Pub.2011.nat.dgeo.IGM.LM.thehyd},
pages = {895-901},
peerreviewed = {Yes},
title = {{The} hydration of alite: a time-resolved quantitative {X}-ray diffraction approach using the {G}-factor method compared with heat release},
year = {2011}
}
@article{faucris.229367151,
abstract = {The hydration of synthetic ye'elimite was studied with sulfate carriers in a stoichiometric ettringite binder system. Heat flow calorimetry, in-situ XRD, 1H-TD-NMR and pore solution analysis were applied in order to gain a deeper understanding of the hydration kinetics of the system. Additionally, thermodynamic modeling was used in order to show the evolution of the pore solution in the system Ca-Al-S-H2O. The experiments showed that a first ettringite generation might be formed in a regime where CAH10, monosulfate, ettringite and AHamorphous are stable while at later points in time the ettringite is formed in a regime where AHmicrocrystalline and ettringite is stable. The different shoulders in the heat flow curve seem to arise from the recrystallization of AHmicrocrystalline and the final adjustment of the water content of the aluminum hydroxide towards AH3.},
author = {Jansen, Daniel and Wolf, Julian and Fobbe, Nicholas},
doi = {10.1016/j.cemconres.2019.105923},
faupublication = {yes},
journal = {Cement and Concrete Research},
month = {Jan},
note = {CRIS-Team Scopus Importer:2019-11-19},
peerreviewed = {Yes},
title = {{The} hydration of nearly pure ye'elimite with a sulfate carrier in a stoichiometric ettringite binder system. {Implications} for the hydration process based on in-situ {XRD}, {1H}-{TD}-{NMR}, pore solution analysis, and thermodynamic modeling},
volume = {127},
year = {2020}
}
@article{faucris.113235584,
abstract = {We present here experimental data of the hydration of C4AF in a Portland cement environment with low sulfate content. Calorimetric data indicate a distinct two-step main reaction of C4AF, which was successfully deconvoluted by laboratory scale in-situ-XRD in combination with the G-factor method and a quantitative approach by mass balance estimation with normalized peak areas of hydrate phases. The presented data here suggest a rapid unhindered dissolution of C4AF after depletion of sulfate in the pore solution, which is then rapidly leading to an oversaturation with respect to sulfate-AFm-16 (C4A$H16). Since the sulfate content of the mixture is low, a second acceleration of C4AF dissolution, due to precipitation of hydroxy-AFm-19 (C4AH19) was observable after the decline in ettringite (C6A$ 3H32) content and the subsequent conversion to sulfate-AFm-16 (C4A$H16). © 2013 Elsevier Ltd.},
author = {Ectors, Dominique and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2013.08.011},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium aluminoferrite (D); Calorimetry (A); Hydration (A); Reaction (A); X-ray diffraction (B)},
note = {UnivIS-Import:2015-03-09:Pub.2013.nat.dgeo.IGM.LM.thehyd},
pages = {61-68},
peerreviewed = {Yes},
title = {{The} hydration of synthetic brownmillerite in presence of low {Ca}-sulfate content and calcite monitored by quantitative in-situ-{XRD} and heat flow calorimetry},
year = {2013}
}
@article{faucris.302895708,
abstract = {In this study, the influence of calcium formate (CF) on the hydration of a synthesized calcium sulfate hemihydrate (HH) powder was investigated. Isothermal calorimetry measurements showed that CF retards the hydration reaction of HH. This was confirmed by XRD of stored samples and pore solution analysis. Two retardation mechanisms were identified. The combination of pore solution and laser granulometric experiments revealed that firstly, the initial dissolution of hemihydrate decelerates because of high Ca2+ ion concentrations, donated by the faster dissolving CF. Secondly, the HCOO- species of CF adsorb on surfaces of the gypsum crystals, as further pore solution measurements showed. This impedes their formation kinetic. The gypsum crystals exhibited anisotropic peak narrowing in XRD measurements when CF was added. This was caused by a morphology change, which could be verified using the anisotropic domain size morphology approach during Rietveld refinement analysis and SEM images. Gypsum crystals exhibit a blockier shape with CF addition compared to the usual acicular shape in pure water.},
author = {Fobbe, Nicholas and Götz-Neunhoeffer, Friedlinde and Jansen, Daniel},
doi = {10.1617/s11527-023-02181-1},
faupublication = {yes},
journal = {Materials and Structures},
note = {CRIS-Team WoS Importer:2023-05-26},
peerreviewed = {Yes},
title = {{The} influence of calcium formate on the hydration of calcium sulfate hemihydrate},
volume = {56},
year = {2023}
}
@article{faucris.113876004,
abstract = {We used in-situ XRD and heat flow calorimetry to investigate the first 44 h of hydration of Ordinary Portland Cement (OPC) blended with siliceous fly ash (FA). By recalculating the heat flow using XRD data it was possible to establish the direct influence of FA on the silicate and aluminate reaction of the OPC hydration in combination with absolute phase quantities. A retarding effect of FA on the silicate reaction was detected, probably induced by the adsorption of Ca2 + ions on the FA surface. The aluminate reaction proved to be influenced by FA. Thereby the filler effect produces an acceleration of the reaction by providing additional nucleation sites. Additionally the reaction itself is very sensitive to the chemical composition of FA. Readily available SO3 seems to be the factor responsible for retarding the aluminate reaction. The increasing of the effective w/s-ratio seems to have only a slight influence on the hydration behavior. © 2013 Elsevier Ltd.},
author = {Dittrich, Sebastian and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2013.11.013},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calorimetry (A); Early hydration; Fly ash (D); Portland cement (D); X-ray diffraction (B)},
note = {UnivIS-Import:2015-03-09:Pub.2014.nat.dgeo.IGM.LM.theinf},
pages = {129-138},
peerreviewed = {Yes},
title = {{The} influence of fly ash on the hydration of {OPC} within the first 44 h - {A} quantitative in situ {XRD} and heat flow calorimetry study},
volume = {56},
year = {2014}
}
@article{faucris.230837158,
abstract = {The impact of two different dialyzed styrene-acrylate polymer dispersions on the early hydration of OPC was studied. The polymer particles of both dispersions show a similar particle size distribution and high charge due to carboxylic groups on the surface of the particles. Both dispersions also show similar adsorption behavior. The hydration of the OPC was studied at a polymer concentration below the initial adsorption in order to evaluate possible reasons for the interaction of the polymer particles with cement hydration. It can be shown that the polymer particle with the lower glass transition temperature Tg shows a stronger impact on cement hydration, which cannot be explained by any influence on the pore solution composition or the initial dissolution of cement phases. Hence, the adsorption mechanism seems to be the most likely cause of the interaction of the polymers with hydrating cement.},
author = {Jansen, Daniel and Lu, Z. and Kong, X. M. and Pakusch, J. and Jahns, E. and Deschner, F. and Schmidtke, Ch},
doi = {10.1617/s11527-019-1435-9},
faupublication = {yes},
journal = {Materials and Structures},
keywords = {Cement hydration; Glass transition temperature; Polymers; Pore solution; Retardation},
note = {CRIS-Team Scopus Importer:2019-12-24},
peerreviewed = {Yes},
title = {{The} influence of the glass transition temperature ({T} g) of polymers on early {OPC} hydration: a complete study of the heat flow, phase evolution, and pore solution chemistry},
volume = {52},
year = {2019}
}
@article{faucris.118866924,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke Esther, Okrusch M., Schubert W., Elwart B., Görke U.},
faupublication = {no},
journal = {Mineralogy and Petrology},
note = {UnivIS-Import:2017-03-24:Pub.2001.nat.dgeo.IGM.profes{\_}1.themar},
pages = {77-111},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{The} marble horizon from {Auerbach}/{Odenwald}: {Phase} relations and {PT} evolution},
year = {2001}
}
@article{faucris.118839424,
abstract = {In the Proterozoic Schist Belt of Nigeria, lenticular bodies of metabasites and meta-ultramafics are frequently intercalated within staurolite bearing metapelitic schists. Such a metamorphosed mafic-ultramafic complex is particularly well exposed in the Mokuro riverbed between the towns of Ife and Ilesha. These outcrops display contact relationships with the surrounding metasediments, as well as between the individual mafic and ultramafic rock types. The most common mafic rocks are indistinctly layered amphibolites, accompanied by apatite rich amphibolites and massive amphibolites, in part rich in ilmenite and pyrrhotite. Among the generally massive ultramafic rocks, nearly monomineralic amphibole rocks predominate, while chlorite-amphibole, talc-chlorite-amphibole and talc bearing olivine-chlorite-amphibole rocks occur in subordinate amounts. Field, textural and geochemical evidence suggest that mafic-ultramafic complex derived from a thick, structurally differentiated basaltic sill that contained doleritic portions in its interior. Slow cooling rates in these inner parts enabled crystal settling with the formation of ultramafic cumulates. Due to the enrichment of volatiles during the crystallization process, higher amounts of apatite and sulphides, as well as late magmatic amphibole, were formed in parts of the mafic-ultramafic body. Mineral assemblages in the mafic-ultramafic complex testify to a metamorphic overprint under amphibolite-facies conditions. Thermodynamic modelling in the system CMFASH leads to an estimated P-T range of 1.5-3 kbar and 550-620°C for the metamorphic peak assemblage talc-olivine-chlorite-Ca amphibole-orthoamphibole.},
author = {Schmädicke, Esther and et al.},
author_hint = {Ige O. A., Okrusch M., Schüssler U., Schmädicke Esther, Cook N. J.},
doi = {10.1016/S0899-5362(98)00035-9},
faupublication = {no},
journal = {Journal of African Earth Sciences},
note = {UnivIS-Import:2017-03-24:Pub.1998.nat.dgeo.IGM.profes{\_}1.themet},
pages = {593-618},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{The} metamorphosed mafic-ultramafic complex of {Mokuro}, {Ilesha} {Schist} {Belt}, southwestern {Nigeria}},
volume = {26},
year = {1998}
}
@article{faucris.216796827,
abstract = {A method is presented to determine the reactivity of supplementary cementitious materials (SCMs) in blended cement systems. To this end, hydration of ordinary Portland cement (OPC) and of OPC blended with the SCMs microsilica and metakaolin has been measured by X-ray diffraction (XRD) and heat flow calorimetry. The quantities of the SCMs in the hydrating mixtures, although of very low crystallinity, could be directly determined by Rietveld refinement employing a method for partially or not known crystal structures (PONKCS method). Considerable amounts of microsilica and metakaolin already react during the first day of hydration in addition to an increased reaction of the cement phases due to the filler effect. The phase assemblage in the hydrated samples is influenced by the SCM present.},
author = {Naber, Christoph and Stegmeyer, Samuel and Jansen, Daniel and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.conbuildmat.2019.04.157},
faupublication = {yes},
journal = {Construction and Building Materials},
keywords = {Amorphous phases; Blended cement; Hydration; Metakaolin; Microsilica; X-ray diffraction},
note = {CRIS-Team Scopus Importer:2019-05-02},
pages = {449-457},
peerreviewed = {Yes},
title = {{The} {PONKCS} method applied for time resolved {XRD} quantification of supplementary cementitious material reactivity in hydrating mixtures with ordinary {Portland} cement},
volume = {214},
year = {2019}
}
@article{faucris.209009012,
author = {Schmädicke, Esther and Gose, Jürgen and Will, T. M.},
doi = {10.1111/j.1525-1314.2010.00876.x},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {Bohemian Massif; Garnet pyroxenite; Garnet peridotite; Ultra high temperature metamorphism; Saxonian Granulitgebirge},
pages = {489-508},
peerreviewed = {Yes},
title = {{The} {P}-{T} evolution of ultra high temperature garnet-bearing ultramafic rocks from the {Saxonian} {Granulitgebirge} {Core} {Complex}, {Bohemian} {Massif}},
volume = {28},
year = {2010}
}
@article{faucris.217747194,
abstract = {The hydration of CA-cement under the influence of low concentrations of phosphoric acid was investigated. The research was focused on the developing phase content and phase equilibria by QXRD and pore water analysis. To obtain a quantitative phase content the G-Factor method was employed, which was established and applied in the last years for different cementitious systems. Pore water extraction was enforced through centrifugation of cement paste and by high pressure squeezing of cement stone. Data could be obtained up to 48 h. The overall heat flow during this time was also recorded by heat flow calorimetry. We found strong influence of phosphoric acid on the pore water composition and thus determining the initially and later formed hydrate phases. The theoretical data of oversaturated phases from thermodynamic point of view were compared to the actual phases detected by QXRD.},
author = {Manninger, Tanja and Jansen, Daniel and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
doi = {10.1016/j.cemconres.2019.04.020},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Calcium aluminate cement (D); Pore solution (B); Retardation (A); Thermodynamic calculations (B); X-ray diffraction (B)},
note = {CRIS-Team Scopus Importer:2019-05-16},
pages = {83-92},
peerreviewed = {Yes},
title = {{The} retarding effect of phosphoric acid during {CAC} hydration},
volume = {122},
year = {2019}
}
@article{faucris.209009359,
author = {Will, T. M. and Schulz, Bernhard and Schmädicke, Esther},
doi = {10.1007/s00531-016-1375-3},
faupublication = {yes},
journal = {International Journal of Earth Sciences},
keywords = {In situ monazite age dating; 40Ar/39Ar age data; Odenwald–Spessart basement; Mid-German Crystalline Zone; Terrane boundary; Paired metamorphic belt},
pages = {1631-1649},
peerreviewed = {Yes},
title = {{The} timing of metamorphism in the {Odenwald}–{Spessart} basement, {Mid}-{German} {Crystalline} {Zone}},
volume = {106},
year = {2017}
}
@article{faucris.309428658,
abstract = {This paper deals with the decisive mechanisms of thixotropic structural build-up in superplasticized cement-based suspensions related to the PCE molecular structure. We investigate the effect of the side chain length and anionic charge ratio of tailored PCE superplasticizers on thixotropic structural build-up under quantitative consideration of colloidal and contact interactions as well as very early hydration kinetics. The thixotropic structural build-up of superplasticized cement pastes with systematically varying the PCE molecular structure was investigated at constant workability, i.e. dynamic yield stress, by adjusting the individual PCE dosage. Thixotropy was quantified using plate-plate rheometry, while at the same time superplasticizer adsorption, specific surface area, granulometric measurements and quantitative XRD analysis provided an experimental basis for the identification of the respective contribution to the structural build-up. Our results show that the thixotropic structural build-up increases with decreasing PCE side chain length and increasing anionic charge ratio. This is due to accelerated very early hydration kinetics, causing an increase in the specific surface area. The latter is primarily attributed to ettringite, modifying the particle size distribution of the hydrated cement paste. Our approach of separating the colloidal and contact interactions indicates that the PCE-induced change in particle size distribution due to accelerated ettringite formation as well as the change in the average effective layer thickness are the dominant mechanisms for the thixotropic structural build-up in this context.},
author = {Nicia, David and Jakob, Cordula and Jansen, Daniel and Ivanov, Dimitri and Mazanec, Oliver and Dengler, Joachim and Neubauer, Jürgen and Lowke, Dirk},
doi = {10.1016/j.cemconres.2023.107289},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Hydration kinetics; Interparticle interactions; Polycarboxylate superplasticizers PCE; Rheology of cement-based suspensions; Thixotropic structural build-up},
note = {CRIS-Team Scopus Importer:2023-08-18},
peerreviewed = {Yes},
title = {{Thixotropy} of superplasticized cement pastes – {Underlying} mechanisms considering the polycarboxylate molecular structure, interparticle interactions and hydration kinetics},
volume = {173},
year = {2023}
}
@inproceedings{faucris.117744264,
author = {Seifert, Severin and Motzet, Hubert and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
booktitle = {GDCh-Monographie},
date = {2007-09-27/2007-09-28},
editor = {GDCh-Fachgruppe Bauchemie},
faupublication = {yes},
isbn = {3-936028-50-8},
note = {UnivIS-Import:2015-04-16:Pub.2007.nat.dgeo.IGM.LM.tiefen},
pages = {265-274},
peerreviewed = {unknown},
publisher = {GDCh-Fachgruppe Bauchemie},
title = {{Tiefenaufgelöste} {Phasenanalyse} von selbstnivellierenden {Bodenspachtelmassen} mit dem {GADDS}},
venue = {Siegen},
volume = {37},
year = {2007}
}
@article{faucris.263721208,
abstract = {As a predominantly lithium-metasilicate-containing glass-ceramic, Obsidian® (Glidewell Laboratories, USA) has a peculiar composition and microstructure among other dental lithium silicates, warranting an evaluation of the crystallization process to establish relationships between microstructural evolution and mechanical properties. Blocks of the pre-crystallized material were processed into slices measuring 12 × 12 × 1.5 mm3 and subjected to the mandatory crystallization firing by interruption the heating ramp at temperatures between 700 °C and 820 °C (dwell time between 0 min and 10 min). The crystallization peaks of the base and the pre-crystallized glass were obtained by differential scanning calorimetry (DSC). The coefficient of thermal expansion and the glass transition temperature were derived from differential thermal analysis (DTA). X-ray diffraction (XRD) was performed to quantify and characterize the crystal phase fraction, whose microstructural changes were visualised using FE-SEM. The ball-on-three-balls surface crack in flexure method was used to track the evolution of fracture toughness. The microstructural evolution during crystallization firing was characterized by two regimes of growth: (i) the progressive revitrification (dissolution) of the 5 μm-sized Li2SiO3 polycrystals manifested at the boundaries of nanometric single coherent scattering domains (CSDs); (ii) the non-isothermal period is marked by an Ostwald ripening process characterized by the growth of the single crystalline structures into 0.5 μm polycrystals. The decrease in the crystal fraction of Li2SiO3 crystals from 41 vol.% to 37 vol.% is accompanied by the formation of a small amount of Li3PO4 (6 vol.%), maintaining the total crystal phase fraction mostly constant. The KIc accompanied the reverse trend of crystallinity, departing from 1.63 ± 0.02 MPa√m at the pre-crystallized stage to 1.84 ± 0.06 MPa√m after 10 min at 820 °C in a linear trend. Toughening appeared counter-intuitive in view of the decreasing crystal fraction and size, to rather relate to the relaxation of the residual stresses in the interstitial glass due to the spheroidization of the initially anisotropic, elongated Li2SiO3 crystals into round, nearly equiaxed particles, as let suggest from the disappearance of the extensive microcracking.},
author = {Lubauer, Julia and Hurle, Katrin and Cicconi, Maria Rita and Petschelt, Anselm and Peterlik, Herwig and Lohbauer, Ulrich and Belli, Renan},
doi = {10.1016/j.jmbbm.2021.104739},
faupublication = {yes},
journal = {Journal of the Mechanical Behavior of Biomedical Materials},
keywords = {Crystallization; Dental; Fracture toughness; Glass-ceramic; Mechanical properties; X-ray Diffraction},
note = {CRIS-Team Scopus Importer:2021-09-10},
peerreviewed = {Yes},
title = {{Toughening} by revitrification of {Li2SiO3} crystals in {Obsidian}® dental glass-ceramic},
volume = {124},
year = {2021}
}
@article{faucris.236506558,
abstract = {The acting mechanism of triethanolamine (TEA) on cement hydration was studied by combination of techniques including calorimetry, in-situ XRD and pore solution analysis. Results show that, a high dosage of TEA (0.5%) results in accelerated aluminate reaction and retarded silicate reaction during hydration of ordinary Portland cement (OPC). The initial dissolutions of C3S, C3A, C4AF and gypsum are greatly facilitated by TEA. The secondary fast reactions of C4AF and C3A triggered by the earlier sulfate-depletion produce a new exothermic peak before the main hydration peak of C3S that usually presents as a shoulder after the main hydration peak in the reference sample. TEA retards the hydration of pure C3S, but much more severely delays the silicate reaction in OPC system, attributed to the negative interference of aluminate reaction on silicate reaction. The new insights into the interaction between TEA and OPC contribute to the theoretical base for regulating cement hydration.},
author = {Lu, Zichen and Kong, Xiangming and Jansen, Daniel and Zhang, Chaoyang and Wang, Jian and Pang, Xiaofan and Yin, Jianhao},
doi = {10.1016/j.cemconres.2020.106041},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {Cement hydration; Complexation; Triethanolamine (TEA)},
note = {CRIS-Team Scopus Importer:2020-03-27},
peerreviewed = {Yes},
title = {{Towards} a further understanding of cement hydration in the presence of triethanolamine},
volume = {132},
year = {2020}
}
@article{faucris.120064384,
author = {Schmidt, Rainer and Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.unters},
pages = {243},
peerreviewed = {Yes},
title = {{Untersuchungen} im {System} {Al2O3} {CaO} {SiO2} {CaSO4} {Na2O}},
year = {1996}
}
@article{faucris.208998797,
author = {Schmädicke, Esther and et al.},
author_hint = {Schmädicke E., Müller W.},
faupublication = {no},
journal = {Contributions To Mineralogy and Petrology},
pages = {629-642},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Unusual} exsolution phenomena in omphacite and partial replacement of phengite by phlogopite + kyanite in an eclogite from the {Erzgebirge}},
url = {https://www.scopus.com/record/display.uri?eid=2-s2.0-0033732726&origin=inward},
volume = {139},
year = {2000}
}
@article{faucris.208995704,
author = {Will, T. M. and Lee, S. -H. and Schmädicke, Esther and Frimmel, H. E. and Okrusch, M.},
doi = {10.1016/j.lithos.2015.01.018},
faupublication = {yes},
journal = {Lithos},
keywords = {Metabasite; Eclogite; Odenwald; Mid-German Crystalline Zone; Terrane boundary; Spessart},
pages = {23-42},
peerreviewed = {Yes},
title = {{Variscan} terrane boundaries in the {Odenwald}-{Spessart} basement, {Mid}-{German} {Crystalline} {Zone}: {New} evidence from ocean ridge, intraplate and arc-derived metabasaltic rocks},
year = {2015}
}
@article{faucris.263747458,
abstract = {This study presents new secondary ion mass spectrometry (SIMS) reference materials (RMs) for measuring water contents in nominally anhydrous orthopyroxenes from upper mantle peridotites. The enstatitic reference orthopyroxenes from spinel peridotite xenoliths have Mg#s between 0.83 and 0.86, Al2O3 ranges between 4.02 and 5.56 wt%, and Cr2O3 ranges between 0.21 and 0.69 wt%. Based on Fourier-transform infrared spectroscopy (FTIR) characterizations, the water contents of the eleven reference orthopyroxenes vary from dry to 249 +/- 6 mu g/g H2O. Using these reference grains, a set of orthopyroxene samples obtained from variably altered abyssal spinel peridotites from the Atlantic and Arctic Ridges as well as from the Izu-Bonin-Mariana forearc region was analyzed by SIMS and FTIR regarding their incorporation of water. The major element composition of the sample orthopyroxenes is typical of spinel peridotites from the upper mantle, characterized by Mg#s between 0.90 and 0.92, Al2O3 between 1.66 and 5.34 wt%, and Cr2O3 between 0.62 and 0.96 wt%. Water contents as measured by SIMS range from 68 +/- 7 to 261 +/- 11 mu g/g H2O and correlate well with Al2O3 contents (r = 0.80) and Cr#s (r(.) = -0.89). We also describe in detail an optimized strategy, employing both SIMS and FTIR, for quantifying structural water in highly altered samples such as abyssal peridotite. This approach first analyzes individual oriented grains by polarized FTIR, which provides an overview of alteration. Subsequently, the same grain along with others of the same sample is measured using SIMS, thereby gaining information about homogeneity at the hand sample scale, which is key for understanding the geological history of these rocks.},
author = {Wenzel, Kirsten and Wiedenbeck, Michael and Gose, Jürgen and Rocholl, Alexander and Schmädicke, Esther},
doi = {10.1007/s00710-021-00757-9},
faupublication = {yes},
journal = {Mineralogy and Petrology},
note = {CRIS-Team WoS Importer:2021-09-10},
peerreviewed = {Yes},
title = {{Water} contents of nominally anhydrous orthopyroxenes from oceanic peridotites determined by {SIMS} and {FTIR}},
year = {2021}
}
@article{faucris.209010630,
author = {Schmädicke, Esther and Gose, Jürgen and Stalder, R.},
doi = {10.1029/2017GC007390},
faupublication = {yes},
journal = {Geochemistry Geophysics Geosystems},
keywords = {restitic mantle; water content; nominally anhydrous minerals; orthopyroxene; MORB source; abyssal peridotite},
pages = {1824-1843},
peerreviewed = {Yes},
title = {{Water} in {Abyssal} {Peridotite}: {Why} {Are} {Melt}-{Depleted} {Rocks} so {Water} {Rich}?},
volume = {19},
year = {2018}
}
@article{faucris.209010963,
author = {Gose, Jürgen and Schmädicke, Esther},
doi = {10.1093/petrology/egy022},
faupublication = {yes},
journal = {Journal of Petrology},
keywords = {Water; Eclogite; Amphibole; Fichtelgebirge; Erzgebirge; Nominally anhydrous minerals; Garnet; Ultra-high pressure metamorphism; Subduction},
pages = {207-232},
peerreviewed = {unknown},
title = {{Water} incorporation in garnet: {Coesite} versus quartz eclogite from {Erzgebirge} and {Fichtelgebirge}},
volume = {59},
year = {2018}
}
@article{faucris.209011289,
author = {Schmädicke, Esther and et al.},
author_hint = {Gose J., Schmädicke E., Beran A.},
doi = {10.1130/G25558A.1},
faupublication = {yes},
journal = {Geology},
pages = {543-546},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Water} in enstatite from {Mid}-{Atlantic} {Ridge} peridotite: {Evidence} for the water content of suboceanic mantle?},
volume = {37},
year = {2009}
}
@article{faucris.240990611,
abstract = {Little is known about water in nominally anhydrous minerals of orogenic garnet peridotite and enclosed metabasic rocks. This study is focused on peridotite-hosted eclogite and garnetite (metarodingite) from the Erzgebirge (EG), Germany, and the Lepontine Alps (LA), Switzerland. Newly discovered, peridotite-hosted eclogite in the Erzgebirge occurs in the same ultra-high pressure (UHP) unit as gneiss-hosted coesite eclogite, from which it is petrologically indistinguishable. Garnet is present in all mafic and ultramafic high pressure (HP) rocks providing for an ideal proxy to compare the H2O content of the different rock types. Garnet composition is very similar in EG and LA samples and depends on the rock type. Garnet from garnetite, compared to eclogite, contains more CaO (garnetite: 10.5–16.5 wt%; eclogite: 5–11 wt%) and is also characterized by an anomalous REE distribution. In contrast, the infrared (IR) spectra of garnet from both rock types reveal the same OH absorption bands that are also identical to those of previously studied peridotitic garnet from the same locations. Two groups of IR bands, SW I (3,650 ± 10 cm−1) and SW II (3,570–3,630 cm−1) are ascribed to structural hydroxyl (colloquially ‘water’). A third, broad band is present in about half of the analysed garnet domains and related to molecular water (MW) in submicroscopic fluid inclusions. The primary content of structural H2O, preserved in garnet domains without fluid inclusions (and MW bands), varies systematically—depending on both the location and the rock type. Garnet from EG rocks contains more water compared to LA samples, and garnet from garnetite (EG: 121–241 wt.ppm H2O; LA: 23–46 wt.ppm) hosts more water than eclogitic garnet (EG: 84 wt.ppm; LA: 4–11 wt.ppm). Higher contents of structural water (SW) are observed in domains with molecular water, in which the SW II band (being not restricted to HP conditions) is simultaneously enhanced. This implies that fluid influx during decompression not only led to fluid inclusions but also favoured the uptake of secondary SW. The results signify that garnet from all EG and LA samples was originally H2O-undersaturated. Combining the data from eclogite, garnetite and previously studied peridotite, H2O and CaO are positively correlated, pointing to the same degree of H2O-undersaturation at peak metamorphism in all rock types. This ubiquitous water-deficiency cannot be reconciled with the derivation of any of these rocks from the lowermost part of the mantle wedge that was in contact with the subducting plate. This agrees with the previously inferred abyssal origin for part of the rocks from the LA (Cima di Gagnone). A similar origin has to be invoked for the Erzgebirge UHP unit. We suggest that all mafic and ultramafic rocks of this unit not only shared the same metamorphic evolution but also a common protolith origin, most probably on the ocean floor. This inference is supported by the presence of peridotite-hosted garnetite, representing metamorphosed rodingite.},
author = {Schmädicke, Esther and Gose, Jürgen},
doi = {10.1111/jmg.12554},
faupublication = {yes},
journal = {Journal of Metamorphic Geology},
keywords = {eclogite; Erzgebirge; garnet; Lepontine Alps; metarodingite; structural water},
note = {CRIS-Team Scopus Importer:2020-07-31},
peerreviewed = {Yes},
title = {{Water} in garnet of garnetite (metarodingite) and eclogite from the {Erzgebirge} and the {Lepontine} {Alps}},
year = {2020}
}
@article{faucris.209011600,
author = {Schmädicke, Esther and et al.},
author_hint = {Gose J., Schmädicke E., Stalder R.},
doi = {10.1127/0935-1221/2011/0023-2122},
faupublication = {yes},
journal = {European Journal of Mineralogy},
keywords = {Infrared spectroscopy; Hydrogen diffusion; Nominally anhydrous minerals; Mid-Atlantic-Ridge; Serpentinization; Orthopyroxene; Water loss; Spinel peridotite},
pages = {529-536},
peerreviewed = {Yes},
support_note = {Author relations incomplete. You may find additional data in field 'author{\_}hint'},
title = {{Water} in mantle orthopyroxene-no visible change in defect water during serpentinization},
volume = {23},
year = {2011}
}
@article{faucris.106998144,
abstract = {Here we present water concentration data for olivine from different host rocks, measured with a nuclear technique using proton-proton scattering. This method, which is used here for the first time on olivine, is very powerful for determining trace amounts of water. The studied olivine specimens differ in their H2O contents, ranging from 4 to 51 wt ppm (=10-117 atom ppm H). The lowest concentrations are found in olivine from spinel peridotite xenoliths, the highest concentrations in olivine from alpine-type peridotite; the contents of an ophiolitic and a hydrothermal olivine are intermediate. Infrared spectroscopy was applied to ensure that the measured water contents stem solely from hydroxyl defects in the mineral structure. The infrared spectra differ from sample to sample. Five of six olivine specimens show absorption bands typical of hydroxyl groups associated with Ti defects. These olivines differ in their Ti contents by two orders of magnitude. However, a correlation of water and Ti content was not observed.},
author = {Gose, Jürgen and Reichart, Patrick and Dollinger, Guenther and Schmädicke, Esther},
doi = {10.2138/am.2008.2835},
faupublication = {yes},
journal = {American Mineralogist},
keywords = {Hydroxyl defects; Nominally anhydrous minerals; Olivine; Peridotite; Proton-proton scattering; Water content},
note = {UnivIS-Import:2017-03-24:Pub.2008.nat.dgeo.IGM.legeo.wateri},
pages = {1613-1619},
peerreviewed = {Yes},
title = {{Water} in natural olivine - determined by proton-proton scattering analysis.},
volume = {93},
year = {2008}
}
@article{faucris.209012315,
author = {Hesse, Kirsten and Gose, Jürgen and Stalder, Roland and Schmädicke, Esther},
doi = {10.1016/j.lithos.2015.06.011},
faupublication = {yes},
journal = {Lithos},
keywords = {Geothermometry; East Pacific Rise; Nominally anhydrous minerals; Infrared spectroscopy; Upper mantle; Orthopyroxene water content},
pages = {23-34},
peerreviewed = {Yes},
title = {{Water} in orthopyroxene from abyssal spinel peridotites of the {East} {Pacific} {Rise} ({ODP} {Leg} 147: {Hess} {Deep})},
volume = {232},
year = {2015}
}
@article{faucris.257695478,
abstract = {Orthopyroxene was analyzed as a proxy for water supra-subduction-zone peridotite by polarized infrared radiation. Samples from Conical and Torishima seamounts, Mariana-Izu-Bonin forearc (ODP-Leg 125), have very similar average H2O contents of 215 ppm (range: 122–363 ppm; Conical) and 191 ppm (range: 116–292 ppm; Torishima). Conical peridotite equilibrated at lower temperature (760°C) and oxygen fugacity (ΔlogFMQ −0.65) than samples from Torishima (830°C; ΔlogFMQ +0.33). The degree of partial melting is almost identical for the two sites (18% and 20%). The H2O concentrations are considerably higher compared to samples from the Bismarck forearc (31–92 ppm; Tollan and Hermann, 2019). Instead, the average values resemble those of peridotitic orthopyroxene from MOR settings. The measured H2O contents by far exceed values expected for residual peridotite. This implies that secondary uptake of water must have occurred after melt-extraction but prior to exhumation to shallow crustal levels. Most likely, re-equilibration took place at c. 50 km depth. As indicated by elemental correlations and/or enhanced contents, the secondary fluid(s) must have been enriched in B, K, Li, and Sr. The boron contents of orthopyroxene are c. 10 times higher those in MOR samples. These findings suggest that peridotite from Conical and Torishima seamounts was presumably infiltrated by fluid generated by dehydration reactions in a subducting plate. The elemental spectrum points to two source lithologies: (i) serpentinite (liberation of B) and metasediments (liberation of K, Li, and Sr). The varying H2O contents point to heterogeneous fluid supply suggesting that fluid infiltration was not pervasive.},
author = {Gose, Jürgen and Schmädicke, Esther},
doi = {10.1029/2020GC009586},
faupublication = {yes},
journal = {Geochemistry Geophysics Geosystems},
keywords = {: mantle wedge; Mariana-Izu-Bonin forearc; orthopyroxene; peridotite; water},
note = {CRIS-Team Scopus Importer:2021-05-07},
peerreviewed = {Yes},
title = {{Water} in the {Supra}-{Subduction}-{Zone} {Mantle} of the {Mariana}-{Izu}-{Bonin} {Forearc}: {Constraints} {From} {Peridotitic} {Orthopyroxene}},
volume = {22},
year = {2021}
}
@article{faucris.209012633,
author = {Schmädicke, Esther and Gose, Jürgen},
doi = {10.2138/am-2017-5920},
faupublication = {yes},
journal = {American Mineralogist},
keywords = {garnet; Eclogite; nominally anhydrous minerals; infrared spectroscopy; subduction; omphacite; water},
pages = {975-986},
peerreviewed = {Yes},
title = {{Water} transport by subduction: {Clues} from garnet of {Erzgebirge} {UHP} eclogite},
volume = {102},
year = {2017}
}
@article{faucris.115704424,
author = {Schmitt, Dirk and Neubauer, Jürgen},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-09:Pub.2000.nat.dgeo.IGM.LM.weiter},
pages = {186},
peerreviewed = {Yes},
title = {{Weiterentwicklung} eines {Wärmeleitungskalorimeters} und {Hydratationsuntersuchungen} an synthetischen {Portlandzementphasen}},
year = {2000}
}
@article{faucris.308211544,
abstract = {The carbonation of C3A and pre-hydrated C3A was studied at different initial pH values, temperatures, pre-hydration and carbonation times. Based on these investigations, the reaction kinetics of C3A under humid conditions were considered in more detail. The reaction products were characterized by quantitative X-ray diffraction (QXRD) and thermogravimetric analysis (TGA). C3A shows no significant reaction when carbonated directly in suspension, however, it has been observed that pre-hydrated C3A can be carbonated. A higher reaction degree was obtained with increasing hydration time. Consistent with reaching a stable pH, no further reaction of the hydrate phases was detected after ~20 min, indicating fast kinetics of the carbonation reaction. At temperatures ≤21 °C, the CaCO3 polymorph vaterite was found to be the main phase. At a pre-hydration temperature of 40 °C, C3AH6 appeared as a stable hydrate phase, but showed no reaction with CO2 under our experimental conditions.},
author = {Villmow, Sophia and Mielkau, Anika and Götz-Neunhoeffer, Friedlinde and Neubauer, Jürgen},
doi = {10.1016/j.cemconres.2023.107259},
faupublication = {yes},
journal = {Cement and Concrete Research},
keywords = {C; Carbonation (C); Carbonation products (B); CO; pH (A); Reaction kinetics (A); Thermal analysis (B); X-ray diffraction (B)},
note = {CRIS-Team Scopus Importer:2023-07-28},
peerreviewed = {Yes},
title = {{Wet} carbonation of {C3A} and pre-hydrated {C3A}},
volume = {173},
year = {2023}
}
@inproceedings{faucris.119904224,
author = {Neumann, Andreas and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde},
faupublication = {yes},
note = {UnivIS-Import:2015-03-09:Pub.2001.nat.dgeo.IGM.LM.xrpdan},
pages = {133},
peerreviewed = {Yes},
title = {{XRPD} and heat flow calorimetry of iron doped monocalciumaluminate},
volume = {Vol. 13},
year = {2001}
}
@article{faucris.115379044,
author = {Sieber, Roland and Neubauer, Jürgen and Pöllmann, Herbert},
faupublication = {yes},
journal = {European Journal of Mineralogy},
note = {UnivIS-Import:2015-03-05:Pub.1996.nat.dgeo.IGM.LM.zurqua},
pages = {262},
peerreviewed = {Yes},
title = {{Zur} quantitativen {Analyse} der {Ferratphase} im {Portlandzementklinker}},
year = {1996}
}
@article{faucris.122377684,
abstract = {In the second half of the 19th century, Roman and Portland cements played an essential role as active hydraulic binder material in building construction and façade ornamentation. Size and heterogeneous phase assemblage of unhydrated cement clinker remnants in historical cement stone differ significantly from those of remnants occurring in modern Portland cement clinker burnt in rotary kilns due to limitations of the production technology available in the 19th century (e.g., comminution and homogeneity of the feedstock, burning temperature and regime in the intermittently operated shaft kilns, grinding machinery). In the common analytical approach, thin sections and fracture surfaces of historical Roman and Portland cement mortars are characterised regarding their mineralogical composition and microstructure using optical and electron microscopic imaging techniques. Raman microspectroscopy can be additionally employed for petrographic examination, overcoming some limitations of the methods used so far. The determination of the phase content of residual cement clinker grains in the hydrated matrix allows for the differentiation of Roman and Portland cement binders. As marker phases, we propose the calcium aluminates CA, C12A7, C2AS and C3A – besides the commonly used calcium silicates C2S and C3S – because of their different formation temperatures and stability fields. This study focuses on the identification of different calcium aluminate and aluminoferrite phases in clinker remnants in samples of cast ornaments of three buildings in Switzerland raised between 1875 and 1893; the obtained Raman spectra are compared with fingerprint spectra of the corresponding pure, synthesised clinker phases collected with the same instrument for an unambiguous data interpretation. In addition to these phases, mainly minerals showing no hydraulic activity, such as, wollastonite CS or rankinite C3S2, free lime, portlandite, iron oxides, garnets, augite, albite and feldspathoids have been identified in the sampled historical cement stones by Raman microspectroscopy. As there is a strong relationship between coexisting clinker phases and the chemical composition of the raw meal as well as the burning and cooling history during clinkering, the results can help in understanding the physical and mechanical characteristics of historical cement mortars. This knowledge is fundamental for the choice and the formulation of appropriate repair materials with tailored properties employed in the field of restoration and preservation of the architectural heritage of the 19th and early 20th centurie},
author = {Dariz, Petra and Neubauer, Jürgen and Götz-Neunhoeffer, Friedlinde and Schmid, Thomas},
doi = {10.1127/ejm/2016/0028-2577},
faupublication = {yes},
journal = {European Journal of Mineralogy},
keywords = {Roman cement; meso Portland cement; clinker relics; monocalcium aluminate (CA); mayenite (C12A7); gehlenite (C2AS); tricalcium aluminate (C3A); calcium aluminate ferrite; free lime; Raman microspectroscopy},
pages = {907-914},
peerreviewed = {Yes},
title = {{Calcium} aluminates in clinker remnants as marker phases for various types of 19th-century cement studied by {Raman} microspectroscopy},
volume = {28},
year = {2016}
}