Gold(I) Sulfide

Gold(I) sulfide, also known as aurous sulfide, is a chemical compound with the chemical formula Au2S. It is a black solid that is insoluble in water and most organic solvents.

Gold(I) sulfide can be prepared by reacting gold(III) chloride with hydrogen sulfide gas, or by adding aqueous sodium sulfide to a solution of a gold(I) salt such as gold(I) chloride. The reaction produces black precipitates of gold(I) sulfide.

Gold(I) sulfide has a face-centered cubic crystal structure with lattice parameter of 5.89 Å. Its melting point is approximately 2000 °C.

Gold(I) sulfide is not commonly used in industrial or commercial applications due to its low stability and reactivity. However, it has shown potential for use in catalysis, sensing, and optoelectronics due to its unique electronic properties.