Iron-delta
      Wyckoff R W G
      Crystal Structures 1 (1963) 7-83
      Second edition. Interscience Publishers, New York, New York
      Sample at T = 1700 K
      Body centered cubic, bcc, structure
      _database_code_amcsd 0011216

      CELL PARAMETERS:    2.9400   2.9400   2.9400   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     25.412
      Density (g/cm3):      7.297
      MAX. ABS. INTENSITY / VOLUME**2:      285.6257535    
      RIR:     12.745
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                43.53        100.00        2.0789    1   1   0        12
                63.26         13.68        1.4700    2   0   0         6
                79.93         23.92        1.2003    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.