AM_Langite Formula: Cu4 S O12 H10 Name: Langite Unit cell: 7.137 6.031 11.217 90.0 90.0 90.0 , V=482.82 Space group: P1C1 (7)

Gentsch M , Weber K , Acta Crystallographica, Section C , 40 (1984) p.1309-1311, Structure of langite, Cu4[(OH)6|SO4]*2H2O, Locality: Allihies mine, County Cork, Ireland