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Acta Cryst. (2006). E62, i256-i257 [ doi:10.1107/S1600536806048045 ]
Abstract: The crystal structure of the title compound, copper(II) diselenium(IV) pentoxide [Meunier, Svensson & Carpy, (1976). Acta Cryst. B32, 2664-2667], has been reinvestigated and confirmed to much higher precision, and anisotropic displacement parameters has been refined. The structure consists of CuO4 planar squares and Se2O5E2 (E = lone pair) dimers. The Cu atom has site symmetry 
and one O atom has site symmetry 2.
Online 22 November 2006
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