Spinel
      Redfern S A T, Harrison R J, O'Neill H St C, Wood D R R
      American Mineralogist 84 (1999) 299-310
      Thermodynamics and kinetics of cation ordering in MgAl2O4 spinel up to 1600 C
      from in situ neutron diffraction
      Data collected at IPNS, Argonne National Laboratory,
      T = 1622 K on cooling cycle, Mg.99Al2O4
      _database_code_amcsd 0002182

      CELL PARAMETERS:    8.1885   8.1885   8.1885   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    549.052
      Density (g/cm3):      3.442
      MAX. ABS. INTENSITY / VOLUME**2:      16.82394871    
      RIR:      1.592
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.77         27.89        4.7276    1   1   1         8
                30.89         32.06        2.8951    2   2   0        12
                36.39        100.00        2.4689    3   1   1        24
                38.07          1.18        2.3638    2   2   2         8
                44.24         54.78        2.0471    4   0   0         6
                54.93          8.13        1.6715    4   2   2        24
                58.58          3.27        1.5759    3   3   3         8
                58.58         34.41        1.5759    5   1   1        24
                64.36         60.19        1.4475    4   4   0        12
                67.69          2.56        1.3841    5   3   1        48
                73.09          2.28        1.2947    6   2   0        24
                76.25          7.55        1.2487    5   3   3        24
                81.43          5.24        1.1819    4   4   4         8
                84.50          1.73        1.1466    5   5   1        24
                89.58          2.95        1.0942    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.