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: M-Cr, 3rd run, T = 900 C
      _database_code_amcsd 0008793

      CELL PARAMETERS:    8.1658   8.1658   8.1658   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    544.498
      Density (g/cm3):      3.553
      MAX. ABS. INTENSITY / VOLUME**2:      18.74545474    
      RIR:      1.718
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.82         34.52        4.7145    1   1   1         8
                30.97         30.60        2.8870    2   2   0        12
                36.49        100.00        2.4621    3   1   1        24
                44.37         53.97        2.0415    4   0   0         6
                55.10          8.02        1.6668    4   2   2        24
                58.75          3.19        1.5715    3   3   3         8
                58.75         36.85        1.5715    5   1   1        24
                64.56         60.65        1.4435    4   4   0        12
                67.91          2.90        1.3803    5   3   1        48
                73.32          2.35        1.2911    6   2   0        24
                76.50          8.19        1.2453    5   3   3        24
                77.55          1.08        1.2310    6   2   2        24
                81.70          5.22        1.1786    4   4   4         8
                84.79          1.97        1.1434    5   5   1        24
                89.90          3.48        1.0912    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.