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 P7, P = 18.82 GPa
      _database_code_amcsd 0017568

      CELL PARAMETERS:    4.5750   4.5750  14.2900   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    259.027
      Density (g/cm3):      4.456
      MAX. ABS. INTENSITY / VOLUME**2:      50.56330540    
      RIR:      3.695
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.71         41.44        3.4650    0   1   2         6
                33.78        100.00        2.6532    1   0   4         6
                39.39         22.94        2.2875    1   1   0         6
                43.91         17.70        2.0620    1   1   3        12
                47.64         20.94        1.9090    2   0   2         6
                52.84         11.44        1.7325    0   2   4         6
                55.72         28.94        1.6498    1   1   6        12
                56.51         17.54        1.6284    0   1   8         6
                62.34          1.73        1.4894    2   1   1        12
                63.47         13.38        1.4657    1   2   2        12
                67.86         10.87        1.3811    2   1   4        12
                69.99          2.42        1.3442    1   0  10         6
                71.06          4.12        1.3266    2   0   8         6
                71.43         11.08        1.3207    3   0   0         6
                72.46          2.10        1.3044    1   1   9        12
                80.69          3.07        1.1908    0   0  12         2
                83.39          2.85        1.1589    0   2  10         6
                84.41          5.36        1.1476    1   2   8        12
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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.