Hercynite
      Larsson L, O'Neill H St C, Annersten H
      European Journal of Mineralogy 6 (1994) 39-51
      Crystal chemistry of synthetic hercynite (FeAl2O4)
      from XRD structural refinements and Mossbauer spectroscopy
      Sample: T = 1100 C, Sample HCl/1
      _database_code_amcsd 0006513

      CELL PARAMETERS:    8.1501   8.1501   8.1501   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.363
      Density (g/cm3):      4.264
      MAX. ABS. INTENSITY / VOLUME**2:      41.86952344    
      RIR:      3.197
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.04         57.86        2.8815    2   2   0        12
                36.57        100.00        2.4573    3   1   1        24
                44.46         13.83        2.0375    4   0   0         6
                48.70          3.45        1.8698    3   3   1        24
                55.21         16.74        1.6636    4   2   2        24
                58.88          3.99        1.5685    3   3   3         8
                58.88         35.89        1.5685    5   1   1        24
                64.70         47.11        1.4407    4   4   0        12
                73.49          5.49        1.2886    6   2   0        24
                76.67          9.47        1.2429    5   3   3        24
                77.72          1.14        1.2287    6   2   2        24
                81.89          1.35        1.1764    4   4   4         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.