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 = 11.2 kbar, T = 23 C
      _database_code_amcsd 0000743

      CELL PARAMETERS:    8.0302   8.0302   8.0302   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    517.820
      Density (g/cm3):      5.373
      MAX. ABS. INTENSITY / VOLUME**2:      78.91577541    
      RIR:      4.782
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.14         39.80        4.6362    1   1   1         8
                31.51          9.11        2.8391    2   2   0        12
                37.13        100.00        2.4212    3   1   1        24
                38.85         17.20        2.3181    2   2   2         8
                45.16         48.29        2.0076    4   0   0         6
                49.48         13.88        1.8423    3   3   1        24
                56.11          2.94        1.6392    4   2   2        24
                59.85          8.58        1.5454    3   3   3         8
                59.85         17.67        1.5454    5   1   1        24
                65.79         45.56        1.4196    4   4   0        12
                69.22          5.76        1.3574    5   3   1        48
                74.77          1.15        1.2697    6   2   0        24
                78.03          8.75        1.2246    5   3   3        24
                79.11          7.50        1.2106    6   2   2        24
                83.38          6.53        1.1591    4   4   4         8
                86.56          1.87        1.1245    7   1   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.