Acta Cryst. (2005). E61, i240-i242  [ doi:10.1107/S1600536805033799 ]

Hexacaesium nonaselenidotetraantimonate(III) hemihydrate

T. Van Almsick and W. S. Sheldrick

Abstract: The title compound, Cs₆Sb₄Se₉·0.5H₂O, contains discrete [Sb₄Se₉]^6- chain anions consisting of corner-linked SbSe₃ pyramids. Molecular C₂ symmetry is observed for these nonaselenidoantimonate(III) anions, which exhibit bridging Sb-Se distances in the range 2.615 (2)-2.650 (3) Å and shorter terminal Sb-Se distances between 2.507 (3) and 2.522 (3) Å.

Online 27 October 2005

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