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 HO19
      Locality: El Hoyazo, lavas of the Neogene Volcanic Province of SE Spain
      _database_code_amcsd 0004917

      CELL PARAMETERS:    8.1584   8.1584   8.1584   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    543.019
      Density (g/cm3):      4.094
      MAX. ABS. INTENSITY / VOLUME**2:      36.73051716    
      RIR:      2.921
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.00         59.11        2.8844    2   2   0        12
                36.53        100.00        2.4599    3   1   1        24
                44.42         15.25        2.0396    4   0   0         6
                48.65          3.89        1.8717    3   3   1        24
                55.15         16.94        1.6653    4   2   2        24
                58.81          3.82        1.5701    3   3   3         8
                58.81         36.78        1.5701    5   1   1        24
                64.63         49.19        1.4422    4   4   0        12
                73.40          5.49        1.2900    6   2   0        24
                76.58          9.45        1.2441    5   3   3        24
                81.79          1.50        1.1776    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.