AM_Cupropolybasite Formula: Ag11.706 Cu4.294 (Sb1.382 As.618) S11 Name: Cupropolybasite Unit cell: 7.3277 7.3277 11.7752 90.0 90.0 120.0 , V=547.56 Space group: P-3M1 (164)

Bindi L , Evain M , Spry P G , Tait K T , Menchetti S , Mineralogical Magazine , 71 (2007) p.641-650, Structural role of copper in the minerals of the pearceite-polybasite group:, the case of the new minerals cupropearceite and cupropolybasite, Locality: Premier mine, Stewart, British Columbia, Canada