Novel Class of Rhenium Borides Based on Hexagonal Boron Networks Interconnected by Short B2Dumbbells

Bykova E, Johansson E, Bykov M, Chariton S, Fei H, Ovsyannikov SV, Aslandukova A, Gabel S, Holz H, Merle B, Alling B, Abrikosov IA, Smith JS, Prakapenka VB, Katsura T, Dubrovinskaia N, Goncharov AF, Dubrovinsky L (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Chemistry of Materials American Chemical Society

DOI: 10.1021/acs.chemmater.2c00520

Abstract

Transition metal borides are known due to their attractive mechanical, electronic, refractive, and other properties. A new class of rhenium borides was identified by synchrotron single-crystal X-ray diffraction experiments in laser-heated diamond anvil cells between 26 and 75 GPa. Recoverable to ambient conditions, compounds rhenium triboride (ReB3) and rhenium tetraboride (ReB4) consist of close-packed single layers of rhenium atoms alternating with boron networks built from puckered hexagonal layers, which link short bonded (~1.7 Å) axially oriented B2 dumbbells. The short and incompressible Re-B and B-B bonds oriented along the hexagonal c-axis contribute to low axial compressibility comparable with the linear compressibility of diamond. Sub-millimeter samples of ReB3 and ReB4 were synthesized in a large-volume press at pressures as low as 33 GPa and used for material characterization. Crystals of both compounds are metallic and hard (Vickers hardness, HV = 34(3) GPa). Geometrical, crystal-chemical, and theoretical analysis considerations suggest that potential ReBx compounds with x > 4 can be based on the same principle of structural organization as in ReB3 and ReB4 and possess similar mechanical and electronic properties.

Authors with CRIS profile

Stefan Gabel Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Hendrik Holz Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften) Benoit Merle Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)

Involved external institutions

Carnegie Institution for Science US United States (USA) (US) Universität Bayreuth DE Germany (DE) Linköping University SE Sweden (SE) Argonne National Laboratory US United States (USA) (US)

How to cite

APA:

Bykova, E., Johansson, E., Bykov, M., Chariton, S., Fei, H., Ovsyannikov, S.V.,... Dubrovinsky, L. (2022). Novel Class of Rhenium Borides Based on Hexagonal Boron Networks Interconnected by Short B2Dumbbells. Chemistry of Materials. https://dx.doi.org/10.1021/acs.chemmater.2c00520

MLA:

Bykova, Elena, et al. "Novel Class of Rhenium Borides Based on Hexagonal Boron Networks Interconnected by Short B2Dumbbells." Chemistry of Materials (2022).

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