Acta Cryst. (2002). E58, i127-i129 [ doi:10.1107/S160053680202161X ]
Abstract: The mixed-valent SeIV/VI compound tricadmium(II) bis-[selenite(IV)] selenate(VI), Cd3(SeO3)2SeO4, contains three crystallographically inequivalent CdII cations, one SeVIO4 tetrahedron and two independent SeIVO3 pyramids corresponding to the formula Cd3(SeO3)2(SeO4). The structure is composed of a three-dimensional network with channels extending parallel to the b axis. Distances and angles within the three [CdOx] polyhedra (x = 6, 8), as well as within the anionic framework, deviate only slightly from those of the isotypic mercury analogue, Hg3Se3O10.
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