Ringwoodite
      Hazen R M, Downs R T, Finger L W
      American Mineralogist 78 (1993) 1320-1323
      Crystal chemistry of ferromagnesian silicate spinels: Evidence for Mg-Si
      disorder
      Sample: SUNY 1097
      _database_code_amcsd 0001626

      CELL PARAMETERS:    8.2030   8.2030   8.2030   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    551.973
      Density (g/cm3):      4.585
      MAX. ABS. INTENSITY / VOLUME**2:      54.30283945    
      RIR:      3.857
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.74         22.02        4.7360    1   1   1         8
                30.83         12.78        2.9002    2   2   0        12
                36.32        100.00        2.4733    3   1   1        24
                38.00          8.58        2.3680    2   2   2         8
                44.16         46.53        2.0508    4   0   0         6
                48.37         11.71        1.8819    3   3   1        24
                54.83          3.98        1.6744    4   2   2        24
                58.46          9.65        1.5787    3   3   3         8
                58.46         15.36        1.5787    5   1   1        24
                64.23         48.22        1.4501    4   4   0        12
                67.56          3.30        1.3866    5   3   1        48
                72.94          1.52        1.2970    6   2   0        24
                76.09          8.76        1.2509    5   3   3        24
                77.13          4.81        1.2366    6   2   2        24
                81.25          5.92        1.1840    4   4   4         8
                84.31          1.47        1.1486    7   1   1        24
                89.38          2.19        1.0962    6   4   2        48
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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.