Villiaumite
      Deshpande V T
      Acta Crystallographica 14 (1961) 794-794
      Thermal expansion of sodium fluoride and sodium bromide
      Note: T = 148 C, rocksalt structure
      _database_code_amcsd 0009254

      CELL PARAMETERS:    4.6537   4.6537   4.6537   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    100.785
      Density (g/cm3):      2.767
      MAX. ABS. INTENSITY / VOLUME**2:      27.74207285    
      RIR:      3.265
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                33.35          1.87        2.6868    1   1   1         8
                38.70        100.00        2.3268    2   0   0         6
                55.88         50.90        1.6453    2   2   0        12
                70.04         12.94        1.3434    2   2   2         8
                83.00          4.76        1.1634    4   0   0         6
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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.