AM_Chalcocite Formula: Bi.138 Cu1.344 S Name: Chalcocite Unit cell: 5.563 5.563 5.563 90.0 90.0 90.0 , V=172.16 Space group: FM3M (225)

Tomeoka K , Ohmasa M , American Mineralogist , 67 (1982) p.360-372, The modulated structure of cubic Cu9BiS6, the alpha phase