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 P4, P = 7.31 GPa
_database_code_amcsd 0017565
4.637 4.637 14.98 90 90 120 R-3c
atom    x y   z Uiso
Fe      0 0   0 .009
C       0 0 .25 .005
O    .278 0 .25 .004