Darstellung und Struktur der Verbindungen MgCuP, BaCuP(As) und BaAgP(As) / Preparation and Crystal Structure of MgCuP, BaCuP(As), and BaAgP(As)

Abstract

Abstract The ABX-compounds MgCuP, BaCuP(As) and BaAgP(As) have been prepared and their structures determined. MgCuP crystallizes orthorhombically in an anti-PbCl2-structure (space group Pnma-D16 2h, a = 653.2(1) pm, b - 383.5(1) pm, c = 717.0(1) pm). The compounds BaCuP(As) and BaAgP(As) are isotypic and crystallize in a modified Ni2ln-structure (space group P63/mmc-D4 6h) with the lattice constants: BaCuP a = 423.9(1) pm, c = 900.6(2) pm, BaCuAs a = 437.2(1) pm, c = 907.3(2) pm, BaAgP a = 449.6(1) pm, c = 882.8(2) pm, BaAgAs a = 461.3(1 )pm, c = 889.6(1) pm.