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 = 700 C
      _database_code_amcsd 0000742

      CELL PARAMETERS:    8.0950   8.0950   8.0950   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    530.458
      Density (g/cm3):      5.245
      MAX. ABS. INTENSITY / VOLUME**2:      73.71958268    
      RIR:      4.577
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.99         40.00        4.6737    1   1   1         8
                31.25          9.31        2.8620    2   2   0        12
                36.82        100.00        2.4407    3   1   1        24
                38.53         16.93        2.3368    2   2   2         8
                44.78         46.99        2.0238    4   0   0         6
                49.05         13.49        1.8571    3   3   1        24
                55.62          2.84        1.6524    4   2   2        24
                59.32          8.17        1.5579    3   3   3         8
                59.32         16.31        1.5579    5   1   1        24
                65.19         41.77        1.4310    4   4   0        12
                68.58          4.99        1.3683    5   3   1        48
                74.07          1.05        1.2799    6   2   0        24
                77.29          7.67        1.2345    5   3   3        24
                78.35          6.42        1.2204    6   2   2        24
                82.57          5.45        1.1684    4   4   4         8
                85.70          1.53        1.1335    7   1   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.