ChemInform Abstract: Crystal Structure and Magnetic Properties of Sm₃CuGeS₇ and Sm₃CuGeSe₇.

Abstract

The new title compounds are prepared from the elements (1150°C, 3 h) and characterized by single crystal XRD and magnetic measurements. The isotypic compounds crystallize in the hexagonal space group P63 with Z = 2 (La3CuSiS7-type structure). The structure is a three-dimensional network of edge-sharing SmX7 (X: S, Se) distorted trigonal prisms which are connected with GeX 4 tetrahedra and CuX 3 triangles by sharing edges. Both compounds are paramagnetic down to 1.72 K.