Spinel
      Princivalle F, Martignago F, Nestola F, Dal Negro A
      European Journal of Mineralogy 24 (2012) 633-643
      Kinetics of cation ordering in synthetic Mg(Al,Fe3+)2O4 spinels
      Note Sample F54, disordered at 1000 C for 24 h, then ordered at 550 C
      Annealing time = 960 min
      _database_code_amcsd 0019313

      CELL PARAMETERS:    8.1690   8.1690   8.1690   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.138
      Density (g/cm3):      3.845
      MAX. ABS. INTENSITY / VOLUME**2:      28.06295986    
      RIR:      2.377
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.82         14.58        4.7164    1   1   1         8
                30.96         35.64        2.8882    2   2   0        12
                36.48        100.00        2.4630    3   1   1        24
                44.36         36.59        2.0422    4   0   0         6
                55.07         10.46        1.6675    4   2   2        24
                58.73          4.05        1.5721    3   3   3         8
                58.73         34.88        1.5721    5   1   1        24
                64.53         56.97        1.4441    4   4   0        12
                67.88          1.41        1.3808    5   3   1        48
                73.29          3.41        1.2916    6   2   0        24
                76.46          9.01        1.2458    5   3   3        24
                77.51          1.29        1.2315    6   2   2        24
                81.66          4.11        1.1791    4   4   4         8
                84.74          1.22        1.1439    5   5   1        24
                89.85          4.72        1.0916    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.