Darstellung und Kristallstruktur von Cu2SrSnS4

Preparation and Crystal Structure of Cu₂SrSnS₄ Cu₂SrSnS₄ was prepared from a mixture of the three binary sulfides at 620-700° C. The structure analyses by single crystal X-ray investigations yields a trigonal C-symmetrie for the unit of the structure with a = 6.29₀ and c = 15.57₈ Å and three formula units. Space group: C–P3₁ (No. 144). Copper and tin have tetrahedral surrounding of S^2?. The neighbourhood of Sr²⁺ has the shape of a deformed archimedic antiprisma.