AM_Polydymite Formula: Ni3 S4 Name: Polydymite Unit cell: 9.457 9.457 9.457 90.0 90.0 90.0 , V=845.79 Space group: FD3M (227)

Lundqvist D , Arkiv for Mineralogi och Geologi , 24 (1947) p.1-12, X-ray studies on the binary system Ni-S, Note: spinel structure, Locality: synthetic