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 ISIS, Rutherford Appleton Laboratory, U.K.
      T = 1573 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002155

      CELL PARAMETERS:    8.1786   8.1786   8.1786   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    547.060
      Density (g/cm3):      3.454
      MAX. ABS. INTENSITY / VOLUME**2:      16.57031436    
      RIR:      1.562
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.79         30.23        4.7219    1   1   1         8
                30.93         32.51        2.8916    2   2   0        12
                36.44        100.00        2.4659    3   1   1        24
                38.12          1.07        2.3610    2   2   2         8
                44.30         54.69        2.0446    4   0   0         6
                55.00          7.89        1.6694    4   2   2        24
                58.65          3.07        1.5740    3   3   3         8
                58.65         34.75        1.5740    5   1   1        24
                64.45         58.67        1.4458    4   4   0        12
                67.79          2.70        1.3824    5   3   1        48
                73.19          2.12        1.2931    6   2   0        24
                76.36          7.33        1.2472    5   3   3        24
                81.54          5.06        1.1805    4   4   4         8
                84.62          1.81        1.1452    5   5   1        24
                89.72          2.80        1.0929    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.