title: High-pressure high-temperature synthesis and structure of α-tetragonal boron.
abstract: Microcrystals of α-tetragonal (α-t) boron with unit cell parametersa=9.05077(6) andc=5.13409(6) Å and measured density 2.16-2.22 g cm-3were obtained by pyrolysis of decaborane B10H14at pressures of 8-9 GPa and temperatures of 1100-1600○C. The crystal structure is in good agreement with the model proposed by Hoardet al(1958J. Am. Chem. Soc.804507). However, compared to the original model, we found small deformations of icosahedra and changes in the interatomic distances within the unit cell of the synthesized α-t boron.
authors.affiliation: Institute for High Pressure Physics RAS, Troitsk, Moscow Region, 142190, Russia.
authors.forename: Evgeny A
authors.initials: EA
authors.lastname: Ekimov
authors.affiliation: A V Shubnikov Institute of Crystallography RAS, Leninskii prospekt 59, Moscow, 119333, Russia.
authors.forename: Igor P
authors.initials: IP
authors.lastname: Zibrov
keywords: high-pressure; synthesis; α-tetragonal boron