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 ISIS, Rutherford Appleton Laboratory, U.K.
      T = 873 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002148

      CELL PARAMETERS:    8.1244   8.1244   8.1244   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.264
      Density (g/cm3):      3.524
      MAX. ABS. INTENSITY / VOLUME**2:      17.91486798    
      RIR:      1.655
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.92         33.21        4.6906    1   1   1         8
                31.14         32.99        2.8724    2   2   0        12
                36.69        100.00        2.4496    3   1   1        24
                38.38          1.08        2.3453    2   2   2         8
                44.61         56.90        2.0311    4   0   0         6
                55.40          8.62        1.6584    4   2   2        24
                59.08          3.01        1.5635    3   3   3         8
                59.08         41.13        1.5635    5   1   1        24
                64.93         67.86        1.4362    4   4   0        12
                68.30          3.31        1.3733    5   3   1        48
                73.76          2.49        1.2846    6   2   0        24
                76.96          9.16        1.2390    5   3   3        24
                82.21          6.39        1.1727    4   4   4         8
                85.32          2.67        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.