Iridium
      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 0011147

      CELL PARAMETERS:    3.8394   3.8394   3.8394   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     56.597
      Density (g/cm3):     22.555
      MAX. ABS. INTENSITY / VOLUME**2:      1901.535948    
      RIR:     27.451
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                40.70        100.00        2.2167    1   1   1         8
                47.35         46.65        1.9197    2   0   0         6
                69.21         25.24        1.3574    2   2   0        12
                83.51         26.91        1.1576    3   1   1        24
                88.14          7.67        1.1083    2   2   2         8
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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.