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: He7a/b
      Note: Coordinates of oxygen changed in order to match the bond lengths.
      _database_code_amcsd 0002879

      CELL PARAMETERS:    8.1306   8.1306   8.1306   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    537.487
      Density (g/cm3):      3.994
      MAX. ABS. INTENSITY / VOLUME**2:      32.22553189    
      RIR:      2.627
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.90          2.67        4.6942    1   1   1         8
                31.11         52.69        2.8746    2   2   0        12
                36.66        100.00        2.4515    3   1   1        24
                44.58         21.62        2.0326    4   0   0         6
                48.82          2.53        1.8653    3   3   1        24
                55.36         15.04        1.6597    4   2   2        24
                59.03         37.93        1.5647    5   1   1        24
                59.03          3.70        1.5647    3   3   3         8
                64.87         53.48        1.4373    4   4   0        12
                73.69          4.85        1.2856    6   2   0        24
                76.89          9.60        1.2399    5   3   3        24
                82.13          2.33        1.1736    4   4   4         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.