Zur Darstellung und Kristallstruktur von Na2CuAs, K2CuAs und K2CuSb.

Abstract

The three new compounds crystallize orthorhombic, space group Cmcm with Na2CuAs: a = 8.86(2) Å, b = 7.22(2) Å, c = 5.34(2) Å; K2CuAs: a = 10.02(2) Å, b = 7.56(2) Å, c = 5.89(2) Å; K2CuSb: a = 10.50(2) Å, b = 7.93(2) Å, c = 6.23(2) Å. There are Cu–E(V)–Cu–E(V)-zigzag-chains in the structure, in which the Cu-atoms are linearly bonded to the E(V)-atoms.