Siderite
      Effenberger H, Mereiter K, Zemann J
      Zeitschrift fur Kristallographie 156 (1981) 233-243
      Crystal structure refinements of magnesite, calcite, rhodochrosite, siderite,
      smithsonite, and dolomite, with discussion of some aspects of the
      stereochemistry of calcite type carbonates
      Locality: Ivigtut, Greenland
      _database_code_amcsd 0020837

      CELL PARAMETERS:    4.6916   4.6916  15.3796   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    293.169
      Density (g/cm3):      3.935
      MAX. ABS. INTENSITY / VOLUME**2:      47.30098123    
      RIR:      3.914
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.78         36.16        3.5924    0   1   2         6
                32.05        100.00        2.7927    1   0   4         6
                38.37         21.16        2.3458    1   1   0         6
                42.37         16.73        2.1331    1   1   3        12
                46.22         19.95        1.9641    2   0   2         6
                50.83         10.86        1.7962    0   2   4         6
                52.67         19.58        1.7377    0   1   8         6
                52.91         29.49        1.7305    1   1   6        12
                60.60          1.86        1.5281    2   1   1        12
                61.58         13.20        1.5060    1   2   2        12
                64.82          2.65        1.4384    1   0  10         6
                65.44         10.33        1.4261    2   1   4        12
                67.02          4.25        1.3963    2   0   8         6
                67.86          2.36        1.3812    1   1   9        12
                68.26          1.11        1.3740    1   2   5        12
                69.39         10.32        1.3543    3   0   0         6
                73.96          3.64        1.2816    0   0  12         2
                77.91          3.18        1.2262    0   2  10         6
                79.96          5.34        1.1999    1   2   8        12
                86.54          3.31        1.1247    1   1  12        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.