Corundum
      d'Amour H, Schiferl D, Denner W, Schulz H, Holzapfel W B
      Journal of Applied Physics 49 (1978) 4411-4416
      High-pressure single-crystal structure determinations for ruby up to 90 kbar
      using an automatic diffractometer
      P = 81 kbar
      _database_code_amcsd 0012919

      CELL PARAMETERS:    4.7212   4.7212  12.8720   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    248.474
      Density (g/cm3):      4.088
      MAX. ABS. INTENSITY / VOLUME**2:      12.72179464    
      RIR:      1.013
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.82         62.32        3.4511    0   1   2         6
                35.50         95.23        2.5287    1   0   4         6
                38.12         44.71        2.3606    1   1   0         6
                43.77         98.26        2.0682    1   1   3        12
                46.62          1.49        1.9484    2   0   2         6
                53.07         49.74        1.7256    0   2   4         6
                58.10        100.00        1.5876    1   1   6        12
                60.32          2.61        1.5344    2   1   1        12
                61.73          3.36        1.5027    1   2   2        12
                61.98          7.34        1.4972    0   1   8         6
                67.20         39.64        1.3931    2   1   4        12
                68.89         61.18        1.3629    3   0   0         6
                71.16          1.31        1.3250    1   2   5        12
                75.14          1.45        1.2644    2   0   8         6
                77.79         17.93        1.2278    1   0  10         6
                78.13          9.47        1.2232    1   1   9        12
                81.56          2.35        1.1803    2   2   0         6
                85.28          1.91        1.1380    2   2   3        12
                87.31          1.44        1.1168    3   1   2        12
                87.53          2.93        1.1146    1   2   8        12
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.