Villiaumite
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      rocksalt structure
      _database_code_amcsd 0011357

      CELL PARAMETERS:    4.6200   4.6200   4.6200   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     98.611
      Density (g/cm3):      2.828
      MAX. ABS. INTENSITY / VOLUME**2:      28.25554413    
      RIR:      3.254
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                33.60          1.90        2.6674    1   1   1         8
                38.99        100.00        2.3100    2   0   0         6
                56.32         50.53        1.6334    2   2   0        12
                70.63         12.80        1.3337    2   2   2         8
                83.74          4.72        1.1550    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.