The disordered cluster compound CaMo5(Mo0.38Ti0.62)O10.
The title compound, calcium pentamolybdenum titanium decaoxide, is isomorphous with the AMo(5)(Ti(0.7)Mo(0.3))O(10) (A = Sr and Eu) compounds. The smaller size of calcium induces a higher molybdenum content on the capping sites of the bioctahedral Mo(10) clusters, leading to more Mo(11) and Mo(12) clusters in the crystal structure. The oxygen framework derives from the stacking of close-packed layers along the a direction in the ...ABAC... sequence. The Ca(2+) ions occupy large cavities which result from the fusion of two cubooctahedra and are surrounded by ten O atoms. The Ti(4+) ion is octahedrally coordinated by the O atoms.
Gougeon
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Sciences Chimiques de Rennes, UMR CNRS No. 6226, Université de Rennes I, Avenue du Général Leclerc, 35042 Rennes Cedex, France. patrick.gougeon@univ-rennes1.fr
Gall
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