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 F39, disordered at 1000 C for 24 h, then ordered at 750 C
      Annealing time = 1 min
      _database_code_amcsd 0019298

      CELL PARAMETERS:    8.1469   8.1469   8.1469   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.726
      Density (g/cm3):      3.770
      MAX. ABS. INTENSITY / VOLUME**2:      25.27284005    
      RIR:      2.183
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         17.85        4.7036    1   1   1         8
                31.05         34.86        2.8804    2   2   0        12
                36.58        100.00        2.4564    3   1   1        24
                44.48         40.77        2.0367    4   0   0         6
                55.24         10.10        1.6630    4   2   2        24
                58.90         36.16        1.5679    5   1   1        24
                58.90          3.86        1.5679    3   3   3         8
                64.73         59.59        1.4402    4   4   0        12
                68.09          1.72        1.3771    5   3   1        48
                73.52          3.26        1.2881    6   2   0        24
                76.71          9.13        1.2424    5   3   3        24
                77.76          1.21        1.2282    6   2   2        24
                81.93          4.58        1.1759    4   4   4         8
                85.03          1.46        1.1408    5   5   1        24
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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.