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 650 C
      Annealing time = 3069 min
      _database_code_amcsd 0019333

      CELL PARAMETERS:    8.1710   8.1710   8.1710   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.539
      Density (g/cm3):      3.842
      MAX. ABS. INTENSITY / VOLUME**2:      27.94464304    
      RIR:      2.368
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.81         15.29        4.7175    1   1   1         8
                30.95         35.85        2.8889    2   2   0        12
                36.47        100.00        2.4636    3   1   1        24
                44.34         36.67        2.0427    4   0   0         6
                55.06         10.42        1.6679    4   2   2        24
                58.71          3.95        1.5725    3   3   3         8
                58.71         35.42        1.5725    5   1   1        24
                64.51         56.99        1.4444    4   4   0        12
                67.86          1.47        1.3812    5   3   1        48
                73.27          3.36        1.2919    6   2   0        24
                76.44          9.04        1.2461    5   3   3        24
                77.49          1.35        1.2318    6   2   2        24
                81.64          4.12        1.1794    4   4   4         8
                84.72          1.29        1.1442    5   5   1        24
                89.83          4.74        1.0919    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.