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 = 189 min
      _database_code_amcsd 0019329

      CELL PARAMETERS:    8.1700   8.1700   8.1700   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.339
      Density (g/cm3):      3.843
      MAX. ABS. INTENSITY / VOLUME**2:      27.96187202    
      RIR:      2.369
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.81         15.20        4.7170    1   1   1         8
                30.96         35.62        2.8885    2   2   0        12
                36.47        100.00        2.4633    3   1   1        24
                44.35         36.81        2.0425    4   0   0         6
                55.07         10.39        1.6677    4   2   2        24
                58.72          3.99        1.5723    3   3   3         8
                58.72         35.20        1.5723    5   1   1        24
                64.52         57.03        1.4443    4   4   0        12
                67.87          1.46        1.3810    5   3   1        48
                73.28          3.37        1.2918    6   2   0        24
                76.45          9.02        1.2459    5   3   3        24
                77.50          1.33        1.2317    6   2   2        24
                81.65          4.14        1.1792    4   4   4         8
                84.73          1.27        1.1440    5   5   1        24
                89.84          4.72        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.