Siderite Lavina B, Dera P, Downs R T, Yang W, Sinogeikin S, Meng Y, Shen G, Schiferl D Physical Review B82 (2010) 064110-8 Structure of siderite FeCO3 to 56 GPa and hysteresis of its spin-pairing transition Locality: Invigtut, Greenland Note: run P16, P = 44.14 GPa _database_code_amcsd 0017578 4.500 4.500 13.25 90 90 120 R-3c atom x y z Uiso Fe 0 0 0 .007 C 0 0 .25 .005 O .280 0 .25 .005