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 = Untreated min
      _database_code_amcsd 0019270

      CELL PARAMETERS:    8.1473   8.1473   8.1473   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.805
      Density (g/cm3):      3.773
      MAX. ABS. INTENSITY / VOLUME**2:      25.26369817    
      RIR:      2.180
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         18.54        4.7038    1   1   1         8
                31.05         34.94        2.8805    2   2   0        12
                36.58        100.00        2.4565    3   1   1        24
                44.48         40.85        2.0368    4   0   0         6
                55.23         10.05        1.6631    4   2   2        24
                58.90          3.80        1.5679    3   3   3         8
                58.90         36.55        1.5679    5   1   1        24
                64.72         59.55        1.4403    4   4   0        12
                68.08          1.79        1.3771    5   3   1        48
                73.52          3.22        1.2882    6   2   0        24
                76.70          9.15        1.2425    5   3   3        24
                77.75          1.26        1.2283    6   2   2        24
                81.92          4.59        1.1760    4   4   4         8
                85.02          1.52        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.