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 = 1405 K on cooling cycle, MgAl2O4
      _database_code_amcsd 0002129

      CELL PARAMETERS:    8.1646   8.1646   8.1646   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    544.256
      Density (g/cm3):      3.472
      MAX. ABS. INTENSITY / VOLUME**2:      17.26847267    
      RIR:      1.619
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.83         28.87        4.7138    1   1   1         8
                30.98         32.21        2.8866    2   2   0        12
                36.50        100.00        2.4617    3   1   1        24
                38.18          1.15        2.3569    2   2   2         8
                44.38         55.12        2.0411    4   0   0         6
                55.11          8.38        1.6666    4   2   2        24
                58.76          3.26        1.5713    3   3   3         8
                58.76         36.15        1.5713    5   1   1        24
                64.57         62.53        1.4433    4   4   0        12
                67.92          2.68        1.3801    5   3   1        48
                73.34          2.41        1.2909    6   2   0        24
                76.51          8.06        1.2451    5   3   3        24
                81.71          5.53        1.1785    4   4   4         8
                84.80          1.91        1.1433    5   5   1        24
                89.92          3.33        1.0910    6   4   2        48
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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.