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-Fe, 3rd run, T = 800 C
      _database_code_amcsd 0008822

      CELL PARAMETERS:    8.1547   8.1547   8.1547   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    542.281
      Density (g/cm3):      3.535
      MAX. ABS. INTENSITY / VOLUME**2:      18.60589989    
      RIR:      1.714
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.85         28.66        4.7081    1   1   1         8
                31.02         33.53        2.8831    2   2   0        12
                36.55        100.00        2.4587    3   1   1        24
                44.44         51.60        2.0387    4   0   0         6
                55.18          8.93        1.6646    4   2   2        24
                58.84         37.92        1.5694    5   1   1        24
                58.84          3.19        1.5694    3   3   3         8
                64.66         62.31        1.4416    4   4   0        12
                68.01          2.43        1.3784    5   3   1        48
                73.44          2.66        1.2894    6   2   0        24
                76.62          8.50        1.2436    5   3   3        24
                81.83          5.12        1.1770    4   4   4         8
                84.93          1.88        1.1419    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.