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 1102

      CELL PARAMETERS:   8.2059  8.2059  8.2059   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      53.49528924    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.73         22.15        4.7377    1   1   1
                30.82         12.90        2.9012    2   2   0
                36.31        100.00        2.4742    3   1   1
                37.98          8.30        2.3688    2   2   2
                44.15         46.59        2.0515    4   0   0
                48.35         11.42        1.8826    3   3   1
                54.81          4.03        1.6750    4   2   2
                58.44          9.53        1.5792    3   3   3
                58.44         15.40        1.5792    5   1   1
                64.21         48.17        1.4506    4   4   0
                67.53          3.21        1.3871    5   3   1
                72.91          1.54        1.2975    6   2   0
                76.06          8.65        1.2514    5   3   3
                77.10          4.55        1.2371    6   2   2
                81.22          5.85        1.1844    4   4   4
                84.28          1.40        1.1491    7   1   1
                89.34          2.18        1.0966    6   4   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.