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 = 973 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002149

      CELL PARAMETERS:    8.1319   8.1319   8.1319   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    537.749
      Density (g/cm3):      3.514
      MAX. ABS. INTENSITY / VOLUME**2:      17.73392665    
      RIR:      1.643
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.90         33.20        4.6950    1   1   1         8
                31.11         32.95        2.8751    2   2   0        12
                36.65        100.00        2.4519    3   1   1        24
                38.34          1.06        2.3475    2   2   2         8
                44.57         56.72        2.0330    4   0   0         6
                55.35          8.50        1.6599    4   2   2        24
                59.02          3.00        1.5650    3   3   3         8
                59.02         40.50        1.5650    5   1   1        24
                64.86         66.74        1.4375    4   4   0        12
                68.23          3.29        1.3745    5   3   1        48
                73.68          2.42        1.2858    6   2   0        24
                76.87          8.94        1.2401    5   3   3        24
                82.11          6.25        1.1737    4   4   4         8
                85.22          2.60        1.1387    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.