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 = 90 kbar
      _database_code_amcsd 0012920

      CELL PARAMETERS:    4.7154   4.7154  12.8510   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    247.460
      Density (g/cm3):      4.105
      MAX. ABS. INTENSITY / VOLUME**2:      12.75551164    
      RIR:      1.012
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.85         62.43        3.4465    0   1   2         6
                35.55         95.35        2.5250    1   0   4         6
                38.17         44.82        2.3577    1   1   0         6
                43.83         98.29        2.0655    1   1   3        12
                46.68          1.50        1.9459    2   0   2         6
                53.15         49.78        1.7233    0   2   4         6
                58.19        100.00        1.5853    1   1   6        12
                60.41          2.61        1.5325    2   1   1        12
                61.82          3.37        1.5008    1   2   2        12
                62.09          7.34        1.4949    0   1   8         6
                67.30         39.67        1.3913    2   1   4        12
                68.99         61.22        1.3612    3   0   0         6
                71.27          1.31        1.3232    1   2   5        12
                75.27          1.46        1.2625    2   0   8         6
                77.94         17.93        1.2258    1   0  10         6
                78.28          9.46        1.2214    1   1   9        12
                81.68          2.35        1.1789    2   2   0         6
                85.42          1.91        1.1366    2   2   3        12
                87.44          1.45        1.1154    3   1   2        12
                87.68          2.94        1.1130    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.