Spinel
      Meducin F, Redfern S A T, Le Godec Y, Stone H J, Tucker M G, Dove M T, Marshall W G
      American Mineralogist 89 (2004) 981-986
      Study of cation order-disorder in MgAl2O4 spinel by in situ neutron
      diffraction up to 1600 K and 3.2 GPa
      Sample at T = 1202 K and P = 2.0 GPa, inversion parameter x = .453
      _database_code_amcsd 0003573

      CELL PARAMETERS:    8.1274   8.1274   8.1274   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.852
      Density (g/cm3):      3.520
      MAX. ABS. INTENSITY / VOLUME**2:      15.87842375    
      RIR:      1.469
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.91         30.67        4.6924    1   1   1         8
                31.12         37.96        2.8735    2   2   0        12
                36.67        100.00        2.4505    3   1   1        24
                38.37          3.93        2.3462    2   2   2         8
                44.60         54.04        2.0319    4   0   0         6
                55.38          9.95        1.6590    4   2   2        24
                59.06          2.12        1.5641    3   3   3         8
                59.06         37.26        1.5641    5   1   1        24
                64.90         61.83        1.4367    4   4   0        12
                73.73          2.92        1.2851    6   2   0        24
                76.92          6.54        1.2394    5   3   3        24
                82.17          3.88        1.1731    4   4   4         8
                85.28          1.15        1.1381    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.