Ringwoodite
      Baur W H
      American Mineralogist 57 (1972) 709-731
      Computer-simulated crystal structures of observed and hypothetical Mg2SiO4
      polymorphs of low and high density
      inverse
      Locality: hypothetical
      _database_code_amcsd 0000279

      CELL PARAMETERS:    8.1700   8.1700   8.1700   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.339
      Density (g/cm3):      3.427
      MAX. ABS. INTENSITY / VOLUME**2:      17.79926068    
      RIR:      1.691
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.81         36.82        4.7170    1   1   1         8
                30.96         33.26        2.8885    2   2   0        12
                36.47        100.00        2.4633    3   1   1        24
                44.35         56.68        2.0425    4   0   0         6
                55.07          8.77        1.6677    4   2   2        24
                58.72          2.86        1.5723    3   3   3         8
                58.72         43.20        1.5723    5   1   1        24
                64.52         68.58        1.4443    4   4   0        12
                67.87          3.40        1.3810    5   3   1        48
                73.28          2.54        1.2918    6   2   0        24
                76.45          9.56        1.2459    5   3   3        24
                77.50          1.10        1.2317    6   2   2        24
                81.65          6.29        1.1792    4   4   4         8
                84.73          2.85        1.1440    5   5   1        24
                89.84          4.54        1.0918    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.