Chalcocite Will G, Hinze E, Abdelrahman A R M European Journal of Mineralogy 14 (2002) 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 _database_code_amcsd 0006938 4.033 4.033 6.739 90 90 120 P6_3/mmc atom x y z occ Biso S 1/3 2/3 1/4 3.0 Cu1 0 0 1/4 .52 4.5 Cu2 1/3 2/3 .585 .285 4.5 Cu3 0 1/2 0 .162 4.5 Cu4 .183 .366 1/4 .125 4.5 Cu5 0 0 0 .05 4.5