Calcite
      Althoff P L
      American Mineralogist 62 (1977) 772-783
      Structural refinements of dolomite and a magnesian calcite and implications for
      dolomite formation in the marine environment
      Mg-calcite
      _database_code_amcsd 0000585

      CELL PARAMETERS:    4.9410   4.9410  16.8640   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    356.550
      Density (g/cm3):      2.752
      MAX. ABS. INTENSITY / VOLUME**2:      24.77765716    
      RIR:      2.931
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.31          7.60        3.8158    0   1   2         6
                29.75        100.00        3.0032    1   0   4         6
                31.84          2.39        2.8107    0   0   6         2
                36.37         13.78        2.4705    1   1   0         6
                39.86         18.73        2.2617    1   1   3        12
                43.65         13.49        2.0738    2   0   2         6
                47.67          6.19        1.9079    0   2   4         6
                48.12         18.26        1.8910    0   1   8         6
                49.10         18.54        1.8556    1   1   6        12
                57.22          2.88        1.6099    2   1   1        12
                58.07          8.24        1.5884    1   2   2        12
                61.40          5.23        1.5100    2   1   4        12
                61.78          2.39        1.5016    2   0   8         6
                62.18          2.34        1.4929    1   1   9        12
                63.83          1.64        1.4583    1   2   5        12
                65.43          5.87        1.4263    3   0   0         6
                66.54          3.13        1.4053    0   0  12         2
                71.19          1.80        1.3244    0   2  10         6
                73.85          2.61        1.2832    1   2   8        12
                78.26          1.89        1.2215    1   1  12        12
                82.67          1.84        1.1673    2   1  10        12
                84.88          1.23        1.1424    1   3   4        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.