AM_Tyrrellite Formula: Cu (Co1.36 Ni.64) Se4 Name: Tyrrellite Unit cell: 9.9885 9.9885 9.9885 90.0 90.0 90.0 , V=996.55 Space group: FD3M (227)

Yang H , Hubler D K , Lavina B , Downs R T , Costin G , Acta Crystallographica, Section C , 63 (2007) p.i73-i74, Tyrrellite, Cu(Co0.68Ni0.32)2Se4, isostructural with spinel, Locality: Eagle Claims, Beaverlodge Lake area, Saskatchewan, Canada