Neue polytelluridostannate (IV): Zur kenntnis von Rb2SnTe5 und Cs4Sn2Te7

Abstract The new compound Rb 2 SnTe 5 crystallizes in the tetragonal system, space group I4cm (No. 108) with the lattice constants 866.6(3) pm, c=1545.1 (5) pm, c a = 1:783 SnTe 4 -tetrahedra and planar Te 5 -groups are connected by common edges to strings, separated by the Rb-ions. The new compound Cs 4 Sn 2 Te 7 crystallizes in the monoclinic system, space group C 2 c (No. 15) with the lattice constants a=1649.1(7) pm, b 786.0(3) pm, c=1903.6(7) pm, B=105.5(1) o Two SnTe 4 -tetrahedra are connected by a common corner and a Te-Te-bridge to a five membered ring, forming a Sn 2 Te 7 4− anion.