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 = 1000 C
      _database_code_amcsd 0008779

      CELL PARAMETERS:    8.1667   8.1667   8.1667   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    544.678
      Density (g/cm3):      3.512
      MAX. ABS. INTENSITY / VOLUME**2:      17.87205287    
      RIR:      1.657
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.82         31.79        4.7150    1   1   1         8
                30.97         31.76        2.8874    2   2   0        12
                36.49        100.00        2.4624    3   1   1        24
                44.37         54.34        2.0417    4   0   0         6
                55.09          8.26        1.6670    4   2   2        24
                58.75          3.14        1.5717    3   3   3         8
                58.75         36.46        1.5717    5   1   1        24
                64.55         61.17        1.4437    4   4   0        12
                67.90          2.62        1.3804    5   3   1        48
                73.31          2.40        1.2913    6   2   0        24
                76.49          7.96        1.2454    5   3   3        24
                81.69          5.19        1.1788    4   4   4         8
                84.77          1.86        1.1436    5   5   1        24
                89.89          3.46        1.0913    6   4   2        48
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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.