Oxygen
      Schiferl D, Cromer D T, Schwalbe L A, Mills R L
      Acta Crystallographica B39 (1983) 153-157
      Structure of 'Orange' 18O2 at 9.6 GPa and 297 K
      Locality: Synthetic
      _database_code_amcsd 0020615

      CELL PARAMETERS:    4.2151   2.9567   6.6897   90.000   90.000   90.000
      SPACE GROUP: Fmmm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     83.372
      Density (g/cm3):      2.549
      MAX. ABS. INTENSITY / VOLUME**2:      20.18016518    
      RIR:      2.578
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.65         26.81        3.3449    0   0   2         2
                39.59        100.00        2.2761    1   1   1         8
                42.91         25.23        2.1075    2   0   0         2
                51.23          5.14        1.7831    2   0   2         4
                54.90          3.05        1.6724    0   0   4         2
                62.86          4.95        1.4784    0   2   0         2
                69.52          1.32        1.3522    0   2   2         4
                72.10          1.80        1.3101    2   0   4         4
                76.39          6.09        1.2468    3   1   1         8
                79.13          3.61        1.2103    2   2   0         4
                82.35          5.20        1.1710    1   1   5         8
                85.28          1.13        1.1381    2   2   2         8
                87.49          1.21        1.1150    0   0   6         2
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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.