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 = 1000 C, Sample HCl/1
      _database_code_amcsd 0006512

      CELL PARAMETERS:    8.1511   8.1511   8.1511   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.563
      Density (g/cm3):      4.263
      MAX. ABS. INTENSITY / VOLUME**2:      41.80754151    
      RIR:      3.193
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.03         57.31        2.8818    2   2   0        12
                36.56        100.00        2.4576    3   1   1        24
                44.46         14.06        2.0378    4   0   0         6
                48.69          3.36        1.8700    3   3   1        24
                55.21         16.66        1.6638    4   2   2        24
                58.87          4.00        1.5687    3   3   3         8
                58.87         35.96        1.5687    5   1   1        24
                64.69         47.24        1.4409    4   4   0        12
                73.48          5.50        1.2888    6   2   0        24
                76.66          9.50        1.2430    5   3   3        24
                77.71          1.16        1.2288    6   2   2        24
                81.88          1.35        1.1765    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.