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 = 240 min
      _database_code_amcsd 0019306

      CELL PARAMETERS:    8.1477   8.1477   8.1477   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.885
      Density (g/cm3):      3.768
      MAX. ABS. INTENSITY / VOLUME**2:      25.11884551    
      RIR:      2.171
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.86         19.03        4.7041    1   1   1         8
                31.05         34.88        2.8806    2   2   0        12
                36.58        100.00        2.4566    3   1   1        24
                44.48         41.14        2.0369    4   0   0         6
                55.23         10.00        1.6631    4   2   2        24
                58.90          3.76        1.5680    3   3   3         8
                58.90         36.75        1.5680    5   1   1        24
                64.72         59.68        1.4403    4   4   0        12
                68.08          1.83        1.3772    5   3   1        48
                73.51          3.19        1.2883    6   2   0        24
                76.70          9.16        1.2425    5   3   3        24
                77.75          1.27        1.2283    6   2   2        24
                81.92          4.62        1.1760    4   4   4         8
                85.02          1.56        1.1409    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.