Acta Cryst. (2007). E63, i149-i150  [ doi:10.1107/S1600536807025135 ]

SrSeO₃ from a combined X-ray and neutron powder diffraction study

O. A. Dityatiev, P. Lightfoot, P. S. Berdonosov and V. A. Dolgikh

Abstract: Strontium trioxoselenate(IV), SrSeO₃, crystallizes in the KClO₃ structure type and is isotypic with BaSeO₃, -PbSeO₃ and the mineral scotlandite (PbSO₃). The Sr²⁺ cation is nine-coordinated by O atoms. The SrO₉ polyhedra are linked together by common edges to form a three-dimensional network, with channels running along the b axis where the Se⁴⁺ cations reside. They are coordinated by three O atoms to form one-sided SeO₃E pyramids (E = electron lone pair), with Se-O bond lengths of 1.672 (6) and 1.688 (3) Å (× 2). The SeO₃E pyramids are not connected to each other; instead, they share O atoms with the SrO₉ polyhedra. Except for one O atom, all other atoms (one Sr, one Se and the second O atom) are located on mirror planes.

Online 31 May 2007

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