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 = 673 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002146

      CELL PARAMETERS:    8.1101   8.1101   8.1101   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    533.430
      Density (g/cm3):      3.542
      MAX. ABS. INTENSITY / VOLUME**2:      18.35912070    
      RIR:      1.688
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.95         32.07        4.6824    1   1   1         8
                31.19         32.80        2.8673    2   2   0        12
                36.75        100.00        2.4453    3   1   1        24
                38.45          1.09        2.3412    2   2   2         8
                44.70         56.88        2.0275    4   0   0         6
                55.51          8.87        1.6555    4   2   2        24
                59.20         41.70        1.5608    5   1   1        24
                59.20          3.14        1.5608    3   3   3         8
                65.06         69.71        1.4337    4   4   0        12
                68.44          3.30        1.3709    5   3   1        48
                73.91          2.66        1.2823    6   2   0        24
                77.12          9.59        1.2368    5   3   3        24
                82.38          6.65        1.1706    4   4   4         8
                85.51          2.72        1.1356    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.