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 P13-2, P = 39.0 GPa
      _database_code_amcsd 0017575

      CELL PARAMETERS:    4.5180   4.5180  13.4570   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    237.887
      Density (g/cm3):      4.852
      MAX. ABS. INTENSITY / VOLUME**2:      52.06348730    
      RIR:      3.494
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.35         44.46        3.3824    0   1   2         6
                35.18        100.00        2.5509    1   0   4         6
                39.91         24.76        2.2590    1   1   0         6
                44.93         18.40        2.0176    1   1   3        12
                48.46         21.93        1.8786    2   0   2         6
                54.24         11.59        1.6912    0   2   4         6
                57.94         27.52        1.5916    1   1   6        12
                59.85         15.62        1.5454    0   1   8         6
                63.26          1.80        1.4700    2   1   1        12
                64.52         13.59        1.4444    1   2   2        12
                69.42         10.89        1.3538    2   1   4        12
                72.47         11.47        1.3042    3   0   0         6
                74.37          3.80        1.2755    2   0   8         6
                74.57          2.05        1.2725    1   0  10         6
                76.38          1.87        1.2468    1   1   9        12
                86.86          2.61        1.1214    0   0  12         2
                87.91          5.07        1.1107    1   2   8        12
                88.11          2.50        1.1087    0   2  10         6
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.