NiSi2
      Wyckoff R W G
      Crystal Structures 1 (1963) 239-444
      Second edition. Interscience Publishers, New York, New York
      Fluorite structure
      _database_code_amcsd 0011702

      CELL PARAMETERS:    5.3950   5.3950   5.3950   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    157.027
      Density (g/cm3):      4.858
      MAX. ABS. INTENSITY / VOLUME**2:      97.32214554    
      RIR:      6.523
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.66         85.26        3.1148    1   1   1         8
                47.68        100.00        1.9074    2   2   0        12
                56.58         31.49        1.6267    3   1   1        24
                69.72         13.98        1.3487    4   0   0         6
                77.05         10.52        1.2377    3   3   1        24
                88.86         26.88        1.1012    4   2   2        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.