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 550 C
      Annealing time = 35,340 min
      _database_code_amcsd 0019279

      CELL PARAMETERS:    8.1466   8.1466   8.1466   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.666
      Density (g/cm3):      3.772
      MAX. ABS. INTENSITY / VOLUME**2:      25.26657021    
      RIR:      2.181
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         18.06        4.7034    1   1   1         8
                31.05         35.37        2.8803    2   2   0        12
                36.58        100.00        2.4563    3   1   1        24
                44.48         40.42        2.0366    4   0   0         6
                55.24         10.16        1.6629    4   2   2        24
                58.91          3.78        1.5678    3   3   3         8
                58.91         36.64        1.5678    5   1   1        24
                64.73         59.47        1.4401    4   4   0        12
                68.09          1.73        1.3770    5   3   1        48
                73.52          3.25        1.2881    6   2   0        24
                76.71          9.15        1.2423    5   3   3        24
                77.76          1.24        1.2281    6   2   2        24
                81.93          4.53        1.1759    4   4   4         8
                85.03          1.50        1.1408    5   5   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.