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 = 1173 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002151

      CELL PARAMETERS:    8.1465   8.1465   8.1465   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.650
      Density (g/cm3):      3.495
      MAX. ABS. INTENSITY / VOLUME**2:      17.41309985    
      RIR:      1.622
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         31.46        4.7034    1   1   1         8
                31.05         32.77        2.8802    2   2   0        12
                36.58        100.00        2.4563    3   1   1        24
                38.27          1.08        2.3517    2   2   2         8
                44.48         55.65        2.0366    4   0   0         6
                55.24          8.42        1.6629    4   2   2        24
                58.91         38.25        1.5678    5   1   1        24
                58.91          3.08        1.5678    3   3   3         8
                64.73         63.93        1.4401    4   4   0        12
                68.09          2.94        1.3770    5   3   1        48
                73.53          2.40        1.2881    6   2   0        24
                76.71          8.40        1.2423    5   3   3        24
                81.93          5.74        1.1758    4   4   4         8
                85.03          2.21        1.1407    5   5   1        24
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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.