Calcite
      Markgraf S A, Reeder R J
      American Mineralogist 70 (1985) 590-600
      High-temperature structure refinements of calcite and magnesite
      Sample: T = 24 C
      _database_code_amcsd 0000984

      CELL PARAMETERS:    4.9880   4.9880  17.0610   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    367.611
      Density (g/cm3):      2.712
      MAX. ABS. INTENSITY / VOLUME**2:      26.72435740    
      RIR:      3.208
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.08          8.36        3.8538    0   1   2         6
                29.43        100.00        3.0351    1   0   4         6
                31.46          2.07        2.8435    0   0   6         2
                36.01         14.35        2.4940    1   1   0         6
                39.45         18.80        2.2840    1   1   3        12
                43.21         14.63        2.0938    2   0   2         6
                47.17          6.50        1.9269    0   2   4         6
                47.55         19.75        1.9123    0   1   8         6
                48.56         20.46        1.8750    1   1   6        12
                56.63          3.42        1.6253    2   1   1        12
                57.47          9.77        1.6036    1   2   2        12
                60.74          5.67        1.5248    2   1   4        12
                61.06          2.63        1.5175    2   0   8         6
                61.44          2.79        1.5092    1   1   9        12
                63.13          2.06        1.4728    1   2   5        12
                64.74          6.69        1.4399    3   0   0         6
                65.67          3.76        1.4218    0   0  12         2
                69.27          1.33        1.3565    2   1   7        12
                70.32          2.30        1.3388    0   2  10         6
                72.98          2.98        1.2964    1   2   8        12
                77.24          2.24        1.2351    1   1  12        12
                81.62          2.54        1.1796    2   1  10        12
                83.88          1.58        1.1534    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.