Zintlphasen mit komplexen Anionen: Zur Kenntnis von Ca₃AlAs₃ und Ba₃AlSb₃/Zintl Phases with Complex Anions: On Ca₃AlAs₃ and Ba₃AlSb₃

Abstract

The new compound Ca 3 AlAs 3 crystallizes in the orthorhombic system (space group: Pnma) with a = 1221.2(3) pm, b = 420.1(2) pm, c = 1343.4(4) pm. In the structure there are AlAs 4 -tetrahedra connected by common corners to „Einereinfach" chains. The new compound Ba 3 AlSb 3 crystallizes in the orthorhombic system (space group: Cmca) with a = 2113.3(10) pm, b = 719.4(5) pm, c = 1400.9(8) pm. AlSb 4 -tetrahedra are connected by common edges to isolated Al 2 Sb 6 groups. According to the compositions and structures both compounds belong to the Zintl-phases.