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 750 C
      Annealing time = 3 min
      _database_code_amcsd 0019338

      CELL PARAMETERS:    8.1701   8.1701   8.1701   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.359
      Density (g/cm3):      3.842
      MAX. ABS. INTENSITY / VOLUME**2:      27.96323157    
      RIR:      2.370
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.81         15.17        4.7170    1   1   1         8
                30.96         35.38        2.8886    2   2   0        12
                36.47        100.00        2.4634    3   1   1        24
                44.35         36.98        2.0425    4   0   0         6
                55.07         10.36        1.6677    4   2   2        24
                58.72          4.03        1.5723    3   3   3         8
                58.72         35.00        1.5723    5   1   1        24
                64.52         57.08        1.4443    4   4   0        12
                67.87          1.47        1.3810    5   3   1        48
                73.28          3.37        1.2918    6   2   0        24
                76.45          9.01        1.2459    5   3   3        24
                77.50          1.32        1.2317    6   2   2        24
                81.65          4.16        1.1793    4   4   4         8
                84.73          1.26        1.1440    5   5   1        24
                89.84          4.69        1.0918    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.