Abstract
Aurivillius phases prepared by mechanochemistry, namely, BIMEVOX (ME = V, Zn, Sc, Sb, In, Pb) metastable solid solutions with γ-Bi2VO5.5 structure have been studied by powder X-ray diffraction. It is found that solid solutions have numerous vacancies and suffer strong disorder: bismuth atoms partially occupy vanadium positions, and Sb3+ and In3+ are distributed over cation sublattices. Disorder and high vacancy concentration are partially preserved even after sintering compaction at 1000 K. Metastable high-temperature modification γ′-Bi2VO5, which is persistent even after air annealing, was obtained for the first time by mechanosynthesis from oxide mixture (Bi2O3+VO2), the room temperature structure being stabilized by disordering. Mechanical treatment of (2Bi2O3+V2O5) mixture yields a combination of fluorite and clinobisvanite BiVO4 phases.
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Original Russian Text Copyright © 2004 by V. V. Zyryanov
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Translated from Zhurnal Strukturnoi Khimii, Vol. 45, Supplement, pp.135–143, 2004.
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Zyryanov, V.V. Structural peculiarities of BIMEVOX (ME = V, Zn, Sc, Sb, In, Pb) Aurivillius phases obtained by mechanochemical synthesis. J Struct Chem 45 (Suppl 1), S133–S141 (2004). https://doi.org/10.1007/s10947-006-0108-z
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DOI: https://doi.org/10.1007/s10947-006-0108-z