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Acta Cryst. (2003). E59, i59-i61 [ doi:10.1107/S1600536803006329 ]
Abstract: The structure of Ba2CoSi2O7 consists of layers made from corner-sharing of [SiO4] and [CoO4] polyhedra. These layers, lying parallel to (001), are linked by Ba
O interactions. Co2+ forms flattened CoO4 tetrahedra (point symmetry 
), which are isolated in the structure. The blue color of the solid might be explained by the coordination mode of the Co atoms.
Online 31 March 2003
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