Ni2SiO4
      Finger L W, Hazen R M, Yagi T
      American Mineralogist 64 (1979) 1002-1009
      Crystal structures and electron densities of nickel and iron silicate spinels at
      elevated temperature or pressure
      P = 0.001 kbar, T = 23 C
      _database_code_amcsd 0000741

      CELL PARAMETERS:    8.0442   8.0442   8.0442   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    520.533
      Density (g/cm3):      5.345
      MAX. ABS. INTENSITY / VOLUME**2:      80.44836422    
      RIR:      4.901
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.11         38.94        4.6443    1   1   1         8
                31.46          9.03        2.8441    2   2   0        12
                37.07        100.00        2.4254    3   1   1        24
                38.78         17.21        2.3222    2   2   2         8
                45.08         49.00        2.0110    4   0   0         6
                49.38         14.25        1.8455    3   3   1        24
                56.00          3.00        1.6420    4   2   2        24
                59.73          8.92        1.5481    3   3   3         8
                59.73         18.24        1.5481    5   1   1        24
                65.66         47.85        1.4220    4   4   0        12
                69.08          6.12        1.3597    5   3   1        48
                74.62          1.21        1.2719    6   2   0        24
                77.87          9.38        1.2267    5   3   3        24
                78.94          8.06        1.2127    6   2   2        24
                83.21          7.15        1.1611    4   4   4         8
                86.38          2.08        1.1264    7   1   1        24
                86.38          1.01        1.1264    5   5   1        24
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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.