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 = 74 kbar
      _database_code_amcsd 0012918

      CELL PARAMETERS:    4.7242   4.7242  12.8810   90.000   90.000  120.000
      SPACE GROUP: R-3c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    248.964
      Density (g/cm3):      4.080
      MAX. ABS. INTENSITY / VOLUME**2:      12.70422837    
      RIR:      1.014
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.80         62.28        3.4534    0   1   2         6
                35.48         95.17        2.5304    1   0   4         6
                38.10         44.66        2.3621    1   1   0         6
                43.74         98.26        2.0696    1   1   3        12
                46.58          1.49        1.9497    2   0   2         6
                53.03         49.72        1.7267    0   2   4         6
                58.06        100.00        1.5887    1   1   6        12
                60.28          2.61        1.5353    2   1   1        12
                61.69          3.36        1.5036    1   2   2        12
                61.93          7.34        1.4983    0   1   8         6
                67.15         39.63        1.3940    2   1   4        12
                68.84         61.18        1.3638    3   0   0         6
                71.11          1.32        1.3258    1   2   5        12
                75.08          1.45        1.2652    2   0   8         6
                77.73         17.93        1.2286    1   0  10         6
                78.07          9.47        1.2241    1   1   9        12
                81.50          2.35        1.1810    2   2   0         6
                85.22          1.91        1.1388    2   2   3        12
                87.24          1.44        1.1175    3   1   2        12
                87.45          2.93        1.1153    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.