Acta Cryst. (2004). E60, i42-i44  [ doi:10.1107/S1600536804002880 ]

Cs₃Hf₂(P₂S₇)₂(PS₄)

A. Gutzmann, C. Näther and W. Bensch

Abstract: The first quaternary hafnium thiophosphate, tricaesium dihafnium pentaphosphorus octadecasulfide, Cs₃Hf₂P₅S₁₈ was synthesized by reacting HfS₂ with an in situ formed melt of Cs₂S₃, P₂S₅ and S. The crystal structure is composed of a two-dimensional anionic [Hf₂P₅S₁₈]^3- layer and intervening Cs⁺ cations. Each of the two independent Hf⁴⁺ ions is surrounded by seven S atoms forming a distorted pentagonal bipyramid. The HfS₇ polyhedra are connected by an unusual edge- and corner-sharing arrangement of [P₂S₇] groups and edge-sharing [PS₄] tetrahedra into the final double-layered anion.

Online 14 February 2004

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