Spinel
      Martignago F, Dal Negro A, Carbonin S
      Physics and Chemistry of Minerals 30 (2003) 401-408
      How Cr3+ and Fe3+ affect Mg-Al order-disorder transformation at high temperature
      in natural spinels
      Sample: L-Cr, 3rd run, T = 900 C
      _database_code_amcsd 0008778

      CELL PARAMETERS:    8.1577   8.1577   8.1577   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    542.879
      Density (g/cm3):      3.524
      MAX. ABS. INTENSITY / VOLUME**2:      18.08072365    
      RIR:      1.671
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.84         32.04        4.7098    1   1   1         8
                31.01         31.78        2.8842    2   2   0        12
                36.53        100.00        2.4596    3   1   1        24
                44.42         54.61        2.0394    4   0   0         6
                55.16          8.35        1.6652    4   2   2        24
                58.82          3.14        1.5699    3   3   3         8
                58.82         37.21        1.5699    5   1   1        24
                64.63         62.32        1.4421    4   4   0        12
                67.98          2.71        1.3789    5   3   1        48
                73.41          2.45        1.2898    6   2   0        24
                76.59          8.20        1.2440    5   3   3        24
                81.80          5.37        1.1775    4   4   4         8
                84.89          1.96        1.1423    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.