Calcium
      Schottmiller J C, King A J, Kanda F A
      Journal of Physical Chemistry 62 (1958) 1446-1449
      The calcium-strontium metal phase system
      Locality: synthetic
      Sample: at T = 415 C
      _database_code_amcsd 0013146

      CELL PARAMETERS:    4.0000   4.0000   6.5000   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     90.067
      Density (g/cm3):      1.478
      MAX. ABS. INTENSITY / VOLUME**2:      27.83961449    
      RIR:      6.135
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.72         23.85        3.4641    1   0   0         6
                27.44         26.54        3.2500    0   0   2         2
                29.21        100.00        3.0571    1   0   1        12
                37.96         15.05        2.3702    1   0   2        12
                45.34         16.54        2.0000    1   1   0         6
                49.63         17.93        1.8369    1   0   3        12
                52.86          2.36        1.7321    2   0   0         6
                53.82         17.65        1.7033    1   1   2        12
                54.85         12.31        1.6737    2   0   1        12
                56.64          2.42        1.6250    0   0   4         2
                60.58          2.79        1.5285    2   0   2        12
                63.20          2.36        1.4712    1   0   4        12
                69.48          4.89        1.3529    2   0   3        12
                72.14          1.41        1.3093    2   1   0        12
                73.83          7.75        1.2835    2   1   1        24
                75.36          4.79        1.2612    1   1   4        12
                78.60          3.08        1.2171    1   0   5        12
                78.81          2.04        1.2145    2   1   2        24
                83.77          1.66        1.1547    3   0   0         6
                86.94          4.43        1.1206    2   1   3        24
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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.