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Acta Cryst. (2006). E62, m2424-m2426 [ doi:10.1107/S1600536806034714 ]

Calcium dipotassium tetraoxalatozirconate(IV) octahydrate

J.-Y. Yang, Y.-L. Fu, J.-L. Ren and S. W. Ng

Abstract: The Ca and Zr atoms in the title compound, poly[octaaquatetra- [mu] -oxalato-calciumdipotassiumzirconate(IV)], [CaK₂Zr(C₂O₄)₄(H₂O)₈], are chelated by bridging oxalate groups to form a three-dimensional network; the two independent water-coordinated K atoms occupy the space within the network and also interact with the oxalate O atoms to result in eight-coordination for the K atoms. The title compound is isostructural with [CdK₂Zr(C₂O₄)₄(H₂O)₈] [Jeanneau, Audebrand & Louer (2002). J. Mater. Chem. 12, 2383-2389]. All the metal ions occupy special positions with $\\overline{4}$ site symmetry.

Online 6 September 2006