Corundum
      Finger L W, Hazen R M
      Journal of Applied Physics 49 (1978) 5823-5826
      Crystal structure and compression of ruby to 46 kbar
      P = 21 kbar
      _database_code_amcsd 0012923

      CELL PARAMETERS:    4.7474   4.7474  12.9542   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    252.844
      Density (g/cm3):      4.017
      MAX. ABS. INTENSITY / VOLUME**2:      11.99410020    
      RIR:      0.972
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.66         64.62        3.4711    0   1   2         6
                35.28         97.91        2.5441    1   0   4         6
                37.90         46.43        2.3737    1   1   0         6
                43.51         98.52        2.0801    1   1   3        12
                46.34          1.52        1.9594    2   0   2         6
                52.74         50.45        1.7356    0   2   4         6
                57.72        100.00        1.5972    1   1   6        12
                59.95          2.59        1.5429    2   1   1        12
                61.35          3.39        1.5111    1   2   2        12
                61.55          7.41        1.5066    0   1   8         6
                66.77         39.65        1.4010    2   1   4        12
                68.46         59.90        1.3705    3   0   0         6
                70.69          1.27        1.3326    1   2   5        12
                74.61          1.47        1.2720    2   0   8         6
                77.21         17.70        1.2355    1   0  10         6
                77.57          8.81        1.2308    1   1   9        12
                81.02          2.37        1.1868    2   2   0         6
                84.70          1.72        1.1444    2   2   3        12
                86.70          1.38        1.1230    3   1   2        12
                86.88          2.88        1.1212    1   2   8        12
                89.40          8.40        1.0960    0   2  10         6
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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.