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 = 1873 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002158

      CELL PARAMETERS:    8.2086   8.2086   8.2086   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    553.098
      Density (g/cm3):      3.416
      MAX. ABS. INTENSITY / VOLUME**2:      15.89072822    
      RIR:      1.514
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.72         28.86        4.7392    1   1   1         8
                30.81         33.04        2.9022    2   2   0        12
                36.30        100.00        2.4750    3   1   1        24
                37.97          1.17        2.3696    2   2   2         8
                44.13         52.63        2.0521    4   0   0         6
                54.79          7.90        1.6756    4   2   2        24
                58.42          3.02        1.5797    3   3   3         8
                58.42         32.39        1.5797    5   1   1        24
                64.18         54.46        1.4511    4   4   0        12
                67.51          2.12        1.3875    5   3   1        48
                72.88          2.10        1.2979    6   2   0        24
                76.03          6.59        1.2518    5   3   3        24
                81.18          4.19        1.1848    4   4   4         8
                84.24          1.35        1.1494    5   5   1        24
                89.31          2.57        1.0969    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.