RaF2
      Wyckoff R W G
      Crystal Structures 1 (1963) 239-444
      Second edition. Interscience Publishers, New York, New York
      Fluorite structure
      _database_code_amcsd 0011715

      CELL PARAMETERS:    6.3680   6.3680   6.3680   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    258.231
      Density (g/cm3):      6.789
      MAX. ABS. INTENSITY / VOLUME**2:      484.7784613    
      RIR:     23.249
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.21        100.00        3.6766    1   1   1         8
                28.02         33.49        3.1840    2   0   0         6
                40.05         53.11        2.2514    2   2   0        12
                47.35         45.28        1.9200    3   1   1        24
                49.59          8.99        1.8383    2   2   2         8
                57.93          7.73        1.5920    4   0   0         6
                63.70         16.59        1.4609    3   3   1        24
                65.56         10.88        1.4239    4   2   0        24
                72.75         13.66        1.2999    4   2   2        24
                77.96          2.78        1.2255    3   3   3         8
                77.96          8.33        1.2255    5   1   1        24
                86.44          3.90        1.1257    4   4   0        12
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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.