Greigite Skinner B J, Erd R C, Grimaldi F S American Mineralogist 49 (1964) 543-555 Greigite, the thio-spinel of iron; a new mineral _database_code_amcsd 0000127 9.876 9.876 9.876 90 90 90 *Fd3m .125 .125 .125 atom x y z Biso Fe .125 .125 .125 3.2 Fe .5 .5 .5 3.2 S .2505 .2505 .2505 3.2