Hercynite
      Andreozzi G B, Lucchesi S
      American Mineralogist 87 (2002) 1113-1120
      Intersite distribution of Fe2+ and Mg in the spinel (sensu stricto) -
      hercynite series by single-crystal X-ray diffraction
      Sample: He100c/a
      _database_code_amcsd 0002882

      CELL PARAMETERS:    8.1646   8.1646   8.1646   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    544.258
      Density (g/cm3):      4.314
      MAX. ABS. INTENSITY / VOLUME**2:      44.21705686    
      RIR:      3.337
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.98         58.38        2.8866    2   2   0        12
                36.50        100.00        2.4617    3   1   1        24
                44.38         13.52        2.0412    4   0   0         6
                48.61          3.56        1.8731    3   3   1        24
                55.11         16.71        1.6666    4   2   2        24
                58.76          3.90        1.5713    3   3   3         8
                58.76         36.28        1.5713    5   1   1        24
                64.57         47.50        1.4433    4   4   0        12
                73.34          5.38        1.2909    6   2   0        24
                76.51          9.47        1.2451    5   3   3        24
                77.56          1.06        1.2309    6   2   2        24
                81.71          1.46        1.1785    4   4   4         8
                89.92          7.94        1.0910    6   4   2        48
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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.