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 859
      _database_code_amcsd 0001624

      CELL PARAMETERS:    8.0709   8.0709   8.0709   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    525.734
      Density (g/cm3):      3.555
      MAX. ABS. INTENSITY / VOLUME**2:      22.79776717    
      RIR:      2.088
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.35         30.88        2.8535    2   2   0        12
                36.94        100.00        2.4335    3   1   1        24
                38.65          2.33        2.3299    2   2   2         8
                44.92         44.12        2.0177    4   0   0         6
                49.21          2.25        1.8516    3   3   1        24
                55.80          9.89        1.6475    4   2   2        24
                59.51         14.85        1.5532    5   1   1        24
                59.51          9.94        1.5532    3   3   3         8
                65.41         61.64        1.4267    4   4   0        12
                74.33          3.84        1.2761    6   2   0        24
                77.56          8.80        1.2308    5   3   3        24
                82.87          4.76        1.1649    4   4   4         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.