Synthesis, structural characterization, and ab initio study of Cu(5+δ)In(2+x)Sb(2-x): a new B8-related structure type.

A new ternary orthorhombic compound with the formula Cu(5+δ)In(2+x)Sb(2-x), crystallizing in the space group Cmc2(1) with 36 atoms per unit cell [a = 10.1813(4) Å, b = 8.4562(4) Å, c = 7.