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 P20-2, P = 47.2 GPa
_database_code_amcsd 0017582
4.368 4.368 12.75 90 90 120 R-3c
atom     x y   z  Uiso
Fe       0 0   0 .0041
C        0 0 .25  .005
O    .2875 0 .25 .0051