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 = 60 kbar
      _database_code_amcsd 0012917

      CELL PARAMETERS:    4.7351   4.7351  12.9010   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    250.503
      Density (g/cm3):      4.055
      MAX. ABS. INTENSITY / VOLUME**2:      12.63953804    
      RIR:      1.015
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.74         62.19        3.4606    0   1   2         6
                35.41         94.99        2.5351    1   0   4         6
                38.01         44.60        2.3675    1   1   0         6
                43.64         98.38        2.0740    1   1   3        12
                46.47          1.49        1.9540    2   0   2         6
                52.92         49.73        1.7303    0   2   4         6
                57.94        100.00        1.5917    1   1   6        12
                60.13          2.62        1.5389    2   1   1        12
                61.53          3.36        1.5070    1   2   2        12
                61.82          7.34        1.5008    0   1   8         6
                66.99         39.66        1.3970    2   1   4        12
                68.66         61.30        1.3669    3   0   0         6
                70.93          1.32        1.3286    1   2   5        12
                74.92          1.45        1.2675    2   0   8         6
                77.58         17.90        1.2306    1   0  10         6
                77.91          9.48        1.2262    1   1   9        12
                81.27          2.35        1.1838    2   2   0         6
                84.98          1.91        1.1413    2   2   3        12
                86.99          1.44        1.1201    3   1   2        12
                87.24          2.93        1.1175    1   2   8        12
                89.82          8.56        1.0919    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.