Elucidating structural order and disorder phenomena in mullite-type Al4B2O9 by automated electron diffraction tomography

Zhao H, Krysiak Y, Hoffmann K, Barton B, Molina-Luna L, Neder R, Kleebe HJ, Gesing TM, Schneider H, Fischer RX, Kolb U (2017)

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Journal of Solid State Chemistry Elsevier

Publisher: Academic Press Inc.

Book Volume: 249

Pages Range: 114-123

DOI: 10.1016/j.jssc.2017.02.023

Abstract

The crystal structure and disorder phenomena of AlBO, an aluminum borate from the mullite-type family, were studied using automated diffraction tomography (ADT), a recently established method for collection and analysis of electron diffraction data. AlBO, prepared by sol-gel approach, crystallizes in the monoclinic space group C2/m. The ab initio structure determination based on three-dimensional electron diffraction data from single ordered crystals reveals that edge-connected AlO octahedra expanding along the b axis constitute the backbone. The ordered structure (A) was confirmed by TEM and HAADF-STEM images. Furthermore, disordered crystals with diffuse scattering along the b axis are observed. Analysis of the modulation pattern implies a mean superstructure (AAB) with a threefold b axis, where B corresponds to an A layer shifted by ½a and ½c. Diffraction patterns simulated for the AAB sequence including additional stacking disorder are in good agreement with experimental electron diffraction patterns.

Authors with CRIS profile

Reinhard Neder Professur für Allgemeine Mineralogie/Kristallographie

Involved external institutions

Universität Bremen DE Germany (DE) Technische Universität Darmstadt DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Zhao, H., Krysiak, Y., Hoffmann, K., Barton, B., Molina-Luna, L., Neder, R.,... Kolb, U. (2017). Elucidating structural order and disorder phenomena in mullite-type Al4B2O9 by automated electron diffraction tomography. Journal of Solid State Chemistry, 249, 114-123. https://doi.org/10.1016/j.jssc.2017.02.023

MLA:

Zhao, Haishuang, et al. "Elucidating structural order and disorder phenomena in mullite-type Al4B2O9 by automated electron diffraction tomography." Journal of Solid State Chemistry 249 (2017): 114-123.

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