Actinium
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York
      Cubic closest packed, ccp, structure
      _database_code_amcsd 0011134

      CELL PARAMETERS:    5.3110   5.3110   5.3110   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    149.806
      Density (g/cm3):     10.063
      MAX. ABS. INTENSITY / VOLUME**2:      910.6898934    
      RIR:     29.466
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                29.12        100.00        3.0663    1   1   1         8
                33.75         50.25        2.6555    2   0   0         6
                48.48         33.79        1.8777    2   2   0        12
                57.56         38.07        1.6013    3   1   1        24
                60.38         10.76        1.5332    2   2   2         8
                70.99          4.60        1.3277    4   0   0         6
                78.50         13.17        1.2184    3   3   1        24
                80.96         11.96        1.1876    4   2   0        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.