AM_Chalcocite_1 Formula: S Cu2.001 Name: Chalcocite Unit cell: 4.033 4.033 6.739 90.0 90.0 120.0 , V=94.93 Space group: P63/MMC (194)

Will G , Hinze E , Abdelrahman A R M , European Journal of Mineralogy , 14 (2002) p.591-598, Crystal structure analysis and refinement of digenite, Cu1.8S, in the, temperature range 20 to 500 C under controlled sulfur partial pressure, Sample: T = 300 C, sometimes called high-chalcocite, Locality: synthetic