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 = 1214 K on cooling cycle, MgAl2O4
      _database_code_amcsd 0002131

      CELL PARAMETERS:    8.1473   8.1473   8.1473   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.805
      Density (g/cm3):      3.494
      MAX. ABS. INTENSITY / VOLUME**2:      17.59746207    
      RIR:      1.640
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         29.80        4.7038    1   1   1         8
                31.05         32.48        2.8805    2   2   0        12
                36.58        100.00        2.4565    3   1   1        24
                38.27          1.17        2.3519    2   2   2         8
                44.48         55.41        2.0368    4   0   0         6
                55.23          8.64        1.6631    4   2   2        24
                58.90          3.22        1.5679    3   3   3         8
                58.90         37.77        1.5679    5   1   1        24
                64.72         64.63        1.4403    4   4   0        12
                68.08          2.74        1.3771    5   3   1        48
                73.52          2.55        1.2882    6   2   0        24
                76.70          8.49        1.2425    5   3   3        24
                81.92          5.75        1.1760    4   4   4         8
                85.02          2.06        1.1409    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.