Hercynite
      Lavina B, Cesare B, Alvarez-Valero A M, Uchida H, Downs R T, Koneva A, Dera P
      American Mineralogist 94 (2009) 657-665
      Closure temperatures of intracrystalline ordering in anatectic and metamorphic
      hercynite, Fe2+Al2O4
      Note: Sample AVHz20
      Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
      _database_code_amcsd 0004919

      CELL PARAMETERS:    8.1517   8.1517   8.1517   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.682
      Density (g/cm3):      4.097
      MAX. ABS. INTENSITY / VOLUME**2:      36.92990000    
      RIR:      2.935
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.03         60.75        2.8821    2   2   0        12
                36.56        100.00        2.4578    3   1   1        24
                44.46         14.68        2.0379    4   0   0         6
                48.69          4.36        1.8701    3   3   1        24
                55.20         17.37        1.6640    4   2   2        24
                58.87          3.76        1.5688    3   3   3         8
                58.87         37.49        1.5688    5   1   1        24
                64.68         49.59        1.4410    4   4   0        12
                73.47          5.62        1.2889    6   2   0        24
                76.65          9.61        1.2431    5   3   3        24
                81.87          1.47        1.1766    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.