Structural chemistry of the cation-ordered perovskites Sr{sub 2}CaMo{sub 1-x}Te{sub x}O{sub 6} (0=<x=<1)
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, Oxfordshire OX1 3QR (United Kingdom)
The crystal structures of Sr{sub 2}CaMoO{sub 6} and Sr{sub 2}CaTeO{sub 6} have been determined at room temperature by neutron powder diffraction. Both compounds crystallize in the perovskite structure with a rock-salt ordered array of Ca{sup 2+} and M{sup 6+} cations (M=Mo, Te) on the six-coordinate sites (space group P2{sub 1}/n (no. 14); for M=Mo, a=5.76228(7), b=5.84790(7), c=8.18707(9)A, {beta}=90.194(1){sup o}, for M=Te, a=5.79919(9), b=5.83756(8), c=8.2175(1)A, {beta}=90.194(1){sup o}). Compositions in the solid solution Sr{sub 2}CaMo{sub 1-x}Te{sub x}O{sub 6} have been synthesized and shown by X-ray diffraction to adopt the same ordered structure. The results are used in a discussion of the cation oxidation states in Ca{sub 2}FeMoO{sub 6} and to establish the similarity between the structural chemistry of hexavalent Mo and Te.
- OSTI ID:
- 20721679
- Journal Information:
- Journal of Solid State Chemistry, Vol. 178, Issue 1; Other Information: DOI: 10.1016/j.jssc.2004.10.035; PII: S0022-4596(04)00578-X; Copyright (c) 2004 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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