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 = 1278 K on cooling cycle, MgAl2O4
      _database_code_amcsd 0002130

      CELL PARAMETERS:    8.1503   8.1503   8.1503   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    541.403
      Density (g/cm3):      3.490
      MAX. ABS. INTENSITY / VOLUME**2:      17.41322028    
      RIR:      1.625
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.86         29.78        4.7056    1   1   1         8
                31.04         32.20        2.8816    2   2   0        12
                36.57        100.00        2.4574    3   1   1        24
                38.25          1.19        2.3528    2   2   2         8
                44.46         56.21        2.0376    4   0   0         6
                55.21          8.31        1.6637    4   2   2        24
                58.88          3.19        1.5685    3   3   3         8
                58.88         37.07        1.5685    5   1   1        24
                64.70         64.04        1.4408    4   4   0        12
                68.05          2.92        1.3777    5   3   1        48
                73.49          2.37        1.2887    6   2   0        24
                76.67          8.22        1.2429    5   3   3        24
                81.89          5.91        1.1764    4   4   4         8
                84.98          2.14        1.1413    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.