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 = 707 K on heating cycle, Mg.99Al2O4
      _database_code_amcsd 0002165

      CELL PARAMETERS:    8.1185   8.1185   8.1185   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    535.091
      Density (g/cm3):      3.531
      MAX. ABS. INTENSITY / VOLUME**2:      18.44570288    
      RIR:      1.701
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.93         30.44        4.6872    1   1   1         8
                31.16         32.83        2.8703    2   2   0        12
                36.71        100.00        2.4478    3   1   1        24
                38.41          1.23        2.3436    2   2   2         8
                44.65         56.17        2.0296    4   0   0         6
                55.45          9.26        1.6572    4   2   2        24
                59.13          3.24        1.5624    3   3   3         8
                59.13         41.29        1.5624    5   1   1        24
                64.98         70.17        1.4352    4   4   0        12
                68.36          2.88        1.3723    5   3   1        48
                73.82          2.90        1.2836    6   2   0        24
                77.02          9.64        1.2381    5   3   3        24
                82.28          6.41        1.1718    4   4   4         8
                85.40          2.43        1.1368    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.