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Acta Cryst. (2004). E60, m659-m661 [ doi:10.1107/S1600536804009626 ]
Abstract: Dicaesium cobalt(II) dioxalate tetrahydrate [tetraaquabis(![[mu]](/logos/entities/mu_rmgif.gif)
-oxalato)cobalt(II)dicaesium(I)], Cs2CoII(C2O4)2·4H2O, has a layered structure and is isotypic with Cs2Mg(C2O4)2·4H2O. The unique Co atom shows octahedral coordination, with a mean Co-O bond length of 2.084 Å. The Cs atom is irregularly coordinated by nine O atoms. Layers of CoO4(H2O)2 octahedra, whose non-water O ligands belong to nearly planar bidentate oxalate groups, are separated by corrugated layers of Cs atoms. Medium-strong hydrogen bonds provide connections within the layer planes. All atoms are in general positions except the Co atom, which lies on a twofold axis.
Online 24 April 2004
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