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 = 45 min
      _database_code_amcsd 0019327

      CELL PARAMETERS:    8.1694   8.1694   8.1694   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    545.218
      Density (g/cm3):      3.846
      MAX. ABS. INTENSITY / VOLUME**2:      28.03310012    
      RIR:      2.374
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.81         15.38        4.7166    1   1   1         8
                30.96         35.02        2.8883    2   2   0        12
                36.48        100.00        2.4632    3   1   1        24
                44.35         37.23        2.0424    4   0   0         6
                55.07         10.28        1.6676    4   2   2        24
                58.73          4.05        1.5722    3   3   3         8
                58.73         34.84        1.5722    5   1   1        24
                64.53         57.10        1.4442    4   4   0        12
                67.87          1.49        1.3809    5   3   1        48
                73.29          3.35        1.2917    6   2   0        24
                76.46          9.00        1.2458    5   3   3        24
                77.51          1.33        1.2316    6   2   2        24
                81.66          4.20        1.1792    4   4   4         8
                84.74          1.26        1.1439    5   5   1        24
                89.85          4.64        1.0917    6   4   2        48
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.