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 = 710 K on cooling cycle, MgAl2O4
      _database_code_amcsd 0002139

      CELL PARAMETERS:    8.1106   8.1106   8.1106   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    533.524
      Density (g/cm3):      3.542
      MAX. ABS. INTENSITY / VOLUME**2:      18.34439761    
      RIR:      1.686
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.95         32.32        4.6826    1   1   1         8
                31.19         33.13        2.8675    2   2   0        12
                36.75        100.00        2.4454    3   1   1        24
                38.45          1.18        2.3413    2   2   2         8
                44.69         56.61        2.0276    4   0   0         6
                55.51          9.09        1.6556    4   2   2        24
                59.19          3.08        1.5609    3   3   3         8
                59.19         42.13        1.5609    5   1   1        24
                65.05         70.08        1.4338    4   4   0        12
                68.43          3.08        1.3709    5   3   1        48
                73.91          2.77        1.2824    6   2   0        24
                77.11          9.62        1.2369    5   3   3        24
                82.38          6.48        1.1707    4   4   4         8
                85.50          2.63        1.1357    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.