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 = 1311 K on heating cycle, Mg.99Al2O4
      _database_code_amcsd 0002174

      CELL PARAMETERS:    8.1623   8.1623   8.1623   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    543.806
      Density (g/cm3):      3.475
      MAX. ABS. INTENSITY / VOLUME**2:      17.52555724    
      RIR:      1.642
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.83         28.10        4.7125    1   1   1         8
                30.99         32.61        2.8858    2   2   0        12
                36.51        100.00        2.4610    3   1   1        24
                38.20          1.23        2.3563    2   2   2         8
                44.39         54.26        2.0406    4   0   0         6
                55.12          8.87        1.6661    4   2   2        24
                58.78          3.32        1.5708    3   3   3         8
                58.78         36.92        1.5708    5   1   1        24
                64.59         63.74        1.4429    4   4   0        12
                67.94          2.39        1.3797    5   3   1        48
                73.36          2.69        1.2906    6   2   0        24
                76.54          8.39        1.2447    5   3   3        24
                81.74          5.38        1.1781    4   4   4         8
                84.83          1.78        1.1430    5   5   1        24
                89.95          3.83        1.0907    6   4   2        48
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.