Calcite
      Paquette J, Reeder R J
      American Mineralogist 75 (1990) 1151-1158
      Single-crystal X-ray structure refinements of two biogenic magnesian calcite
      crystals
      sample LS
      _database_code_amcsd 0001327

      CELL PARAMETERS:    4.9673   4.9673  16.9631   90.000   90.000  120.000
      SPACE GROUP: R-32/c    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    362.474
      Density (g/cm3):      2.723
      MAX. ABS. INTENSITY / VOLUME**2:      25.69792905    
      RIR:      3.073
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.18          7.79        3.8365    0   1   2         6
                29.58        100.00        3.0200    1   0   4         6
                31.65          2.29        2.8272    0   0   6         2
                36.17         14.01        2.4836    1   1   0         6
                39.63         19.04        2.2740    1   1   3        12
                43.40         14.21        2.0849    2   0   2         6
                47.39          6.37        1.9183    0   2   4         6
                47.83         19.18        1.9019    0   1   8         6
                48.81         19.79        1.8659    1   1   6        12
                56.89          3.23        1.6185    2   1   1        12
                57.73          9.21        1.5969    1   2   2        12
                61.03          5.53        1.5182    2   1   4        12
                61.40          2.54        1.5100    2   0   8         6
                61.79          2.64        1.5014    1   1   9        12
                63.44          1.90        1.4662    1   2   5        12
                65.04          6.43        1.4339    3   0   0         6
                66.10          3.52        1.4136    0   0  12         2
                69.64          1.20        1.3502    2   1   7        12
                70.73          2.12        1.3319    0   2  10         6
                73.38          2.86        1.2903    1   2   8        12
                77.73          2.11        1.2285    1   1  12        12
                82.11          2.27        1.1738    2   1  10        12
                84.32          1.45        1.1485    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.