Oxygen
      Lundegaard L F, Guillaume C, McMahon M I, Gregoryanz E, Merlini M
      Journal of Chemical Physics 130 (2009) 164516
      On the structure of high-pressure high-temperature eta-O2
      Locality: Synthetic
      _database_code_amcsd 0020613

      CELL PARAMETERS:    2.5610   2.5610   6.5750   90.000   90.000  120.000
      SPACE GROUP: P6_3/mmc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     37.346
      Density (g/cm3):      2.845
      MAX. ABS. INTENSITY / VOLUME**2:      15.43239800    
      RIR:      1.766
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.12         33.70        3.2875    0   0   2         2
                40.68         29.62        2.2179    1   0   0         6
                43.04        100.00        2.1015    1   0   1        12
                49.58          4.59        1.8386    1   0   2        12
                55.94          3.32        1.6437    0   0   4         2
                71.43          1.30        1.3206    1   0   4        12
                74.03          5.59        1.2805    1   1   0         6
                80.50          1.35        1.1932    1   1   2        12
                85.93          3.32        1.1311    1   0   5        12
                89.66          2.18        1.0935    2   0   1        12
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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.