Acta Cryst. (2005). E61, i256-i258  [ doi:10.1107/S1600536805034574 ]

Cs₂(SO₄)_0.57(SeO₄)_0.43·Te(OH)₆, an adduct between dicaesium sulfate selenate and telluric acid

M. Abdelhedi, M. Dammak, A. Cousson, M. Nierlich and K. Abdelwaheb

Abstract: The title compound, dicaesium sulfate selenate-telluric acid adduct, Cs₂(SO₄)_0.57(SeO₄)_0.43·Te(OH)₆, is a solid solution in the series Cs₂(SO₄)·Te(OH)₆/Cs₂(SeO₄)·Te(OH)₆. It crystallizes in the same structure as the end member Cs₂(SeO₄)·Te(OH)₆ in space group P2₁/c, whereas the corresponding sulfate adopts another structure type and crystallizes in space group R3. The structure contains planes of statistically distributed SO₄/SeO₄ tetrahedra alternating with planes of Te(OH)₆ octahedra, and with Cs⁺ cations situated between the planes. Both Te atoms lie on centres of symmetry.

Online 31 October 2005

Copyright © International Union of Crystallography
IUCr Webmaster