Iron
      Wilburn D R, Bassett W A
      American Mineralogist 63 (1978) 591-596
      Hydrostatic compression of iron and related compounds: An overview
      P = 57 Kbar
      _database_code_amcsd 0000676

      CELL PARAMETERS:    2.8350   2.8350   2.8350   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     22.786
      Density (g/cm3):      8.138
      MAX. ABS. INTENSITY / VOLUME**2:      313.7558941    
      RIR:     12.553
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                45.23        100.00        2.0046    1   1   0        12
                65.89         13.35        1.4175    2   0   0         6
                83.53         23.56        1.1574    2   1   1        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.