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 = 898 K on cooling cycle, MgAl2O4
      _database_code_amcsd 0002136

      CELL PARAMETERS:    8.1239   8.1239   8.1239   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.159
      Density (g/cm3):      3.524
      MAX. ABS. INTENSITY / VOLUME**2:      17.98453240    
      RIR:      1.662
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.92         32.62        4.6903    1   1   1         8
                31.14         33.09        2.8722    2   2   0        12
                36.69        100.00        2.4494    3   1   1        24
                38.38          1.20        2.3452    2   2   2         8
                44.62         56.69        2.0310    4   0   0         6
                55.41          8.86        1.6583    4   2   2        24
                59.09          3.02        1.5634    3   3   3         8
                59.09         41.19        1.5634    5   1   1        24
                64.93         68.45        1.4361    4   4   0        12
                68.31          3.08        1.3732    5   3   1        48
                73.76          2.62        1.2845    6   2   0        24
                76.96          9.21        1.2389    5   3   3        24
                82.21          6.31        1.1726    4   4   4         8
                85.33          2.55        1.1376    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.