Hydrothermal synthesis and structure determination of the new vanadium molybdenum mixed oxide V{sub 1.1}Mo{sub 0.9}O{sub 5} from synchrotron X-ray powder diffraction data
- CEMES/CNRS, 29 rue J. Marvig, B.P. 94347, 31055 Toulouse Cedex 4 (France)
- European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble (France)
A new vanadium molybdenum mixed oxide V{sub 1.1}Mo{sub 0.9}O{sub 5} [V(V){sub 0.2}V(IV){sub 0.9}Mo(VI){sub 0.9}O{sub 5}] has been synthesized, as a pure phase, via hydrothermal methods in the presence of molybdic acid and vanadyl sulfate. Its crystal structure has been solved ab initio from high-resolution powder diffraction data collected at the ESRF beamline ID31. This compound crystallizes in the monoclinic symmetry, space group C2/m, with cell dimensions a=12.1230(2)A, b=3.7168(1)A, c=4.0336(1)A, {beta}=90.625(3){sup o} and Z=2 per formula. The structure consists of double strings of VO{sub 5} square pyramids sharing edges and corners along [100] and [010], and more weakly bound along [001]. In this latter direction, the bond (V,Mo)-O=2.377A, while remaining long, leads for the first time to the interpenetration of the apical oxygens of the [(V,Mo){sub 2}O{sub 5}]{sub n} layers, resulting in a three-dimensional (3D) structure closely related to R-Nb{sub 2}O{sub 5}. This structure will be compared to the pure layer structure of V{sub 2}O{sub 5} where this bond reaches 2.793A.
- OSTI ID:
- 20902483
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 12; Other Information: DOI: 10.1016/j.jssc.2006.07.018; PII: S0022-4596(06)00412-9; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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