AM_Umangite_1 Formula: Cu3 Se2 Name: Umangite Unit cell: 6.4024 6.4024 4.2786 90.0 90.0 90.0 , V=175.38 Space group: P-421M (113)

Heyding R D , Murray R M , Canadian Journal of Chemistry , 54 (1976) p.841-848, Crystal structures of Cu1.8Se, Cu3Se2, alpha- and gamma=CuSe, CuSe2, and CuSe2II, Locality: Beaverlodge Region, Saskatchewan, Canada