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 = 1418 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002119

      CELL PARAMETERS:    8.1636   8.1636   8.1636   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    544.058
      Density (g/cm3):      3.473
      MAX. ABS. INTENSITY / VOLUME**2:      17.20314067    
      RIR:      1.613
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.83         28.96        4.7133    1   1   1         8
                30.98         32.39        2.8863    2   2   0        12
                36.50        100.00        2.4614    3   1   1        24
                38.19          1.17        2.3566    2   2   2         8
                44.39         54.75        2.0409    4   0   0         6
                55.11          8.42        1.6664    4   2   2        24
                58.77          3.24        1.5711    3   3   3         8
                58.77         36.02        1.5711    5   1   1        24
                64.58         61.98        1.4431    4   4   0        12
                67.93          2.58        1.3799    5   3   1        48
                73.35          2.43        1.2908    6   2   0        24
                76.52          7.97        1.2449    5   3   3        24
                81.73          5.37        1.1783    4   4   4         8
                84.81          1.84        1.1431    5   5   1        24
                89.93          3.35        1.0909    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.