The pyrochlore-type molybdate Pr(1.37)Ca(0.63)Mo(2)O(7)

Praseodymium calcium dimolybdenum hepta­oxide, Pr(1.37)Ca(0.63)Mo(2)O(7), crystallizes in the cubic pyrochlore-type structure. In the crystal structure, MoO(6) octa­hedra are linked together by common corners, forming a three-dimensional [Mo(2)O(6)] network. The Pr and Ca atoms and the remaining O a...

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Detalles Bibliográficos
Autores principales: Gall, P., Gougeon, P.
Formato: Texto
Lenguaje:English
Publicado: International Union of Crystallography 2008
Materias:
Inorganic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2961417/
https://www.ncbi.nlm.nih.gov/pubmed/21202443
http://dx.doi.org/10.1107/S1600536808015328
Descripción
Sumario:Praseodymium calcium dimolybdenum hepta­oxide, Pr(1.37)Ca(0.63)Mo(2)O(7), crystallizes in the cubic pyrochlore-type structure. In the crystal structure, MoO(6) octa­hedra are linked together by common corners, forming a three-dimensional [Mo(2)O(6)] network. The Pr and Ca atoms and the remaining O atoms are located in the voids of the [Mo(2)O(6)] network. The Pr and Ca atoms are distributed statistically over the same 16c crystallographic position with site-occupancy factors of 0.684 (3) and 0.316 (3), respectively. They are surrounded by eight O atoms forming a ditrigonal scalenohedron. All atoms lie on special positions. The (Pr, Ca) and Mo atoms are, respectively in the 16c and 16d positions with [Image: see text] m symmetry, and the O atoms in the 48f or 8a positions with mm or [Image: see text]3m site symmetry, respectively.

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