Rb2O2
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      Rubidium peroxide
      _database_code_amcsd 0011668

      CELL PARAMETERS:    4.2010   7.0750   5.9830   90.000   90.000   90.000
      SPACE GROUP: Immm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    177.827
      Density (g/cm3):      3.789
      MAX. ABS. INTENSITY / VOLUME**2:      70.31251247    
      RIR:      6.042
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.43          4.78        4.5685    0   1   1         4
                24.65          5.05        3.6122    1   1   0         4
                25.17         34.25        3.5375    0   2   0         2
                25.91         73.75        3.4381    1   0   1         4
                29.87         34.48        2.9915    0   0   2         2
                36.44        100.00        2.4655    1   2   1         8
                39.45         30.22        2.2842    0   2   2         4
                43.06         16.01        2.1005    2   0   0         2
                50.53          8.99        1.8061    2   2   0         4
                50.67         16.57        1.8016    1   0   3         4
                51.68          8.43        1.7687    0   4   0         2
                53.29         10.97        1.7191    2   0   2         4
                57.40         13.05        1.6054    1   2   3         8
                58.70         12.06        1.5728    1   4   1         8
                59.82         14.45        1.5462    2   2   2         8
                60.84          6.79        1.5225    0   4   2         4
                62.05          2.22        1.4957    0   0   4         2
                68.05          6.02        1.3777    0   2   4         4
                68.86          3.42        1.3635    3   0   1         4
                69.47          5.57        1.3530    2   4   0         4
                74.59          7.94        1.2723    3   2   1         8
                75.29          7.68        1.2622    1   4   3         8
                77.42          5.71        1.2327    2   4   2         8
                78.50          1.98        1.2184    2   0   4         4
                84.01          5.73        1.1520    2   2   4         8
                84.12          2.65        1.1508    1   0   5         4
                84.55          2.61        1.1460    3   0   3         4
                84.91          1.56        1.1421    0   4   4         4
                87.44          4.71        1.1154    1   6   1         8
                89.29          1.84        1.0970    0   6   2         4
                89.57          2.96        1.0944    1   2   5         8
                90.00          2.92        1.0902    3   2   3         8
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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.