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 = 1058 K and P = 1.9 GPa, inversion parameter x = .524
      _database_code_amcsd 0003576

      CELL PARAMETERS:    8.1171   8.1171   8.1171   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    534.814
      Density (g/cm3):      3.533
      MAX. ABS. INTENSITY / VOLUME**2:      16.77553436    
      RIR:      1.546
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.94         28.61        4.6864    1   1   1         8
                31.17         36.95        2.8698    2   2   0        12
                36.72        100.00        2.4474    3   1   1        24
                38.42          3.16        2.3432    2   2   2         8
                44.65         53.41        2.0293    4   0   0         6
                55.46         10.21        1.6569    4   2   2        24
                59.14          2.47        1.5621    3   3   3         8
                59.14         38.28        1.5621    5   1   1        24
                64.99         64.24        1.4349    4   4   0        12
                68.37          1.02        1.3720    5   3   1        48
                73.84          3.19        1.2834    6   2   0        24
                77.04          7.42        1.2378    5   3   3        24
                82.30          4.20        1.1716    4   4   4         8
                85.41          1.23        1.1366    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.