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 = 1164 K on heating cycle, MgAl2O4
      _database_code_amcsd 0002115

      CELL PARAMETERS:    8.1443   8.1443   8.1443   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.200
      Density (g/cm3):      3.498
      MAX. ABS. INTENSITY / VOLUME**2:      17.63489587    
      RIR:      1.642
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         30.23        4.7021    1   1   1         8
                31.06         32.85        2.8794    2   2   0        12
                36.59        100.00        2.4556    3   1   1        24
                38.28          1.23        2.3510    2   2   2         8
                44.50         55.43        2.0361    4   0   0         6
                55.26          8.78        1.6624    4   2   2        24
                58.93          3.15        1.5674    3   3   3         8
                58.93         38.53        1.5674    5   1   1        24
                64.75         65.34        1.4397    4   4   0        12
                68.11          2.69        1.3766    5   3   1        48
                73.55          2.61        1.2877    6   2   0        24
                76.74          8.60        1.2420    5   3   3        24
                81.96          5.74        1.1755    4   4   4         8
                85.06          2.10        1.1404    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.