AM_Chalcocite_2 Formula: Cu2 S Name: Chalcocite Unit cell: 15.246 11.884 13.494 90.0 116.35 90.0 , V=2190.86 Space group: P121/C1 (14)

Evans H T , Zeitschrift fur Kristallographie , 150 (1979) p.299-320, The crystal structures of low chalocite and djurleite, Locality: Bristol Connecticut, USA