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 = 700 C
      _database_code_amcsd 0008776

      CELL PARAMETERS:    8.1423   8.1423   8.1423   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    539.810
      Density (g/cm3):      3.544
      MAX. ABS. INTENSITY / VOLUME**2:      18.34431296    
      RIR:      1.686
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.88         34.46        4.7010    1   1   1         8
                31.07         32.08        2.8787    2   2   0        12
                36.60        100.00        2.4550    3   1   1        24
                44.51         55.37        2.0356    4   0   0         6
                55.27          8.36        1.6620    4   2   2        24
                58.94          3.03        1.5670    3   3   3         8
                58.94         39.46        1.5670    5   1   1        24
                64.77         64.31        1.4394    4   4   0        12
                68.13          3.09        1.3763    5   3   1        48
                73.57          2.43        1.2874    6   2   0        24
                76.76          8.70        1.2417    5   3   3        24
                81.99          5.74        1.1752    4   4   4         8
                85.09          2.34        1.1401    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.