Abstract: | K3Au5Pb: Layers of AuAu3/2] Gold Tetrahedra and Pb2/2] Lead Chains Silver coloured, brittle single crystals of K3Au5Pb were synthesized by reaction of potassium azide with gold sponge and lead powder at T = 920 K. The structure of the compound (space group Imma, Z = 4, a = 5.646(1) Å, b = 19.500(4) Å, c = 8.412(1) Å) was determined from X-ray single-crystal diffractometry data. The gold lead partial structure consists of layers of AuAu3/2] tetrahedra and Pb2/2] zigzag chains with four-bonded lead atoms which are connected to a framework structure via Au–Pb contacts. The potassium atoms occupy channels within the gold lead partial structure. |