Acta Cryst. (2007). E63, i166  [ doi:10.1107/S1600536807025445 ]

TlSrPS₄, the first strontium quaternary thiophosphate

I. Belkyal, M. El Azhari, C. Näther, W. Bensch and W. Depmeier

Abstract: The new thallium(I) strontium(II) thiophosphate TlSrPS₄ is isostructural with TlPbPS₄ and exhibits a layered structure. Each layer is composed of [(SrS₆)(TlS₆)]_n zigzag chains, which consist of irregular trigonal prisms centred alternately by Tl and Sr atoms. Adjacent [TlS₆] and [SrS₆] prisms share common triangular faces to form one-dimensional chains parallel to [001]. These chains are connected along [010] by sharing edges of rectangular faces in such a way that the apical edges of the prisms point alternately up and down, forming parallel zigzag layers. The layers are stacked perpendicular to the crystallographic a axis and are held together by [PS₄] tetrahedra.

Online 27 June 2007

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