Zinc Thiophosphite, Zn₃(PS₃)₂

Zinc Thiophosphite, Zn₃(PS₃)₂, is prepared by heating for twenty- four hours at a red heat a mixture of phosphorus, sulphur, and zinc. The clear yellow crystalline plates belong to the hexagonal system. Moist air decomposes them with evolution of hydrogen sulphide, and nitric acid acts on them readily.