AM_Smythite Formula: Fe3 S4 Name: Smythite Unit cell: 3.47 3.47 34.5 90.0 90.0 120.0 , V=359.76 Space group: R-3M (166)

Erd R C , Evans H T , Richter D H , American Mineralogist , 42 (1957) p.309-333, Smythite, a new iron sulfide, and associated pyrrhotite from Indiana