Caesium cadmium chloride

Caesium cadmium chloride (CsCdCl3) is a synthetic crystalline material. It belongs to the AMX3 group (where A=alkali metal, M=bivalent metal, X=halogen ions). It crystallizes in a hexagonal space group "P63/"mmc with unit cell lengths "a" = 7.403 Å and "c" = 18.406 Å, with one cadmium ion having "D3d" symmetry and the other having "C3v" symmetry.
It is formed when an aqueous solution of hydrochloric acid containing an equimolar solution of caesium chloride and cadmium chloride.