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.
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