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 1013

      CELL PARAMETERS:   8.1763  8.1763  8.1763   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      MAX. ABS. INTENSITY / VOLUME**2:      46.40860989    
               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.80         16.07        4.7206    1   1   1
                30.93         15.03        2.8908    2   2   0
                36.45        100.00        2.4652    3   1   1
                38.13          5.09        2.3603    2   2   2
                44.31         46.00        2.0441    4   0   0
                48.53          9.79        1.8758    3   3   1
                55.02          4.73        1.6690    4   2   2
                58.67          9.72        1.5735    3   3   3
                58.67         15.25        1.5735    5   1   1
                64.47         50.07        1.4454    4   4   0
                67.81          2.42        1.3820    5   3   1
                73.21          1.82        1.2928    6   2   0
                76.38          8.78        1.2469    5   3   3
                77.43          3.54        1.2326    6   2   2
                81.57          5.69        1.1801    4   4   4
                84.65          1.18        1.1449    7   1   1
                89.75          2.57        1.0926    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.