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 = 950 C, Sample BG2/1
      _database_code_amcsd 0006525

      CELL PARAMETERS:    8.1520   8.1520   8.1520   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.742
      Density (g/cm3):      4.261
      MAX. ABS. INTENSITY / VOLUME**2:      42.03164647    
      RIR:      3.212
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.03         58.16        2.8822    2   2   0        12
                36.56        100.00        2.4579    3   1   1        24
                44.45         13.65        2.0380    4   0   0         6
                48.69          3.55        1.8702    3   3   1        24
                55.20         16.91        1.6640    4   2   2        24
                58.86          4.01        1.5689    3   3   3         8
                58.86         36.18        1.5689    5   1   1        24
                64.68         47.34        1.4411    4   4   0        12
                73.47          5.58        1.2889    6   2   0        24
                76.65          9.60        1.2432    5   3   3        24
                77.70          1.17        1.2290    6   2   2        24
                81.87          1.33        1.1766    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.