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 = 916 K on heating cycle, Mg.99Al2O4
      _database_code_amcsd 0002168

      CELL PARAMETERS:    8.1332   8.1332   8.1332   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    538.005
      Density (g/cm3):      3.512
      MAX. ABS. INTENSITY / VOLUME**2:      18.01278267    
      RIR:      1.670
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.90         31.62        4.6957    1   1   1         8
                31.10         32.89        2.8755    2   2   0        12
                36.65        100.00        2.4523    3   1   1        24
                38.34          1.21        2.3479    2   2   2         8
                44.56         56.53        2.0333    4   0   0         6
                55.34          8.92        1.6602    4   2   2        24
                59.01          3.11        1.5652    3   3   3         8
                59.01         40.79        1.5652    5   1   1        24
                64.85         68.57        1.4378    4   4   0        12
                68.22          3.01        1.3748    5   3   1        48
                73.67          2.68        1.2860    6   2   0        24
                76.86          9.24        1.2403    5   3   3        24
                82.10          6.31        1.1739    4   4   4         8
                85.21          2.47        1.1389    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.