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 P25, P = 54.0 GPa _database_code_amcsd 0017587 4.355 4.355 12.54 90 90 120 R-3c atom x y z Uiso Fe 0 0 0 .0075 C 0 0 .25 .005 O .2898 0 .25 .009