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 = 800 C
      _database_code_amcsd 0008777

      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):      3.533
      MAX. ABS. INTENSITY / VOLUME**2:      18.21209130    
      RIR:      1.678
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.86         32.99        4.7056    1   1   1         8
                31.04         31.93        2.8816    2   2   0        12
                36.57        100.00        2.4574    3   1   1        24
                44.46         54.65        2.0376    4   0   0         6
                55.21          8.40        1.6637    4   2   2        24
                58.88          3.11        1.5685    3   3   3         8
                58.88         38.11        1.5685    5   1   1        24
                64.70         62.96        1.4408    4   4   0        12
                68.05          2.81        1.3777    5   3   1        48
                73.49          2.47        1.2887    6   2   0        24
                76.67          8.42        1.2429    5   3   3        24
                81.89          5.45        1.1764    4   4   4         8
                84.98          2.07        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.