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 = 650 C
      _database_code_amcsd 0008775

      CELL PARAMETERS:    8.1381   8.1381   8.1381   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    538.975
      Density (g/cm3):      3.549
      MAX. ABS. INTENSITY / VOLUME**2:      18.26587038    
      RIR:      1.676
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.89         38.92        4.6985    1   1   1         8
                31.08         32.97        2.8773    2   2   0        12
                36.62        100.00        2.4537    3   1   1        24
                44.53         56.92        2.0345    4   0   0         6
                55.30          8.28        1.6612    4   2   2        24
                58.97          2.69        1.5662    3   3   3         8
                58.97         42.71        1.5662    5   1   1        24
                64.81         66.63        1.4386    4   4   0        12
                68.17          3.58        1.3756    5   3   1        48
                73.61          2.30        1.2867    6   2   0        24
                76.81          9.08        1.2410    5   3   3        24
                77.86          1.04        1.2269    6   2   2        24
                82.04          6.15        1.1746    4   4   4         8
                85.14          2.91        1.1396    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.