Acta Cryst. (2007). E63, i153-i154  [ doi:10.1107/S1600536807027705 ]

K₂(SO₄)_0.63(SeO₄)_0.37·Te(OH)₆

M. Abdelhedi, L. Ktari, M. Dammak, A. Cousson and A. Kolsi

Abstract: The title compound, dipotassium sulfate selenate/telluric acid adduct, K₂(SO₄)_0.63(SeO₄)_0.47·Te(OH)₆, is a solid solution in the series K₂SO₄·Te(OH)₆/K₂SeO₄·Te(OH)₆. It crystallizes in the same structure as the end member K₂SO₄·Te(OH)₆ in the space group P, whereas the other end-member K₂SeO₄·Te(OH)₆ crystallizes in the space group C2/c. The structure of the solid solution consists of planes of Te(OH)₆ octahedra alternating with planes of statistically occupied XO₄ tetrahedra (X = S and Se), and with K⁺ cations situated between the planes. The structure is stabilized by interplanar O-HO hydrogen bonds involving all the H atoms that belong to the OH groups of the Te(OH)₆ octahedra. Both Te atoms lie on inversion centres.

Online 13 June 2007

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