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: H-Cr, 3rd run, T = 700 C
      _database_code_amcsd 0008806

      CELL PARAMETERS:    8.1569   8.1569   8.1569   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    542.720
      Density (g/cm3):      3.589
      MAX. ABS. INTENSITY / VOLUME**2:      19.42895598    
      RIR:      1.763
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.84         38.65        4.7094    1   1   1         8
                31.01         30.33        2.8839    2   2   0        12
                36.54        100.00        2.4594    3   1   1        24
                44.43         55.74        2.0392    4   0   0         6
                55.16          7.88        1.6650    4   2   2        24
                58.83          3.00        1.5698    3   3   3         8
                58.83         39.57        1.5698    5   1   1        24
                64.64         63.62        1.4419    4   4   0        12
                67.99          3.46        1.3788    5   3   1        48
                73.42          2.28        1.2897    6   2   0        24
                76.60          8.71        1.2439    5   3   3        24
                77.65          1.18        1.2297    6   2   2        24
                81.81          5.85        1.1773    4   4   4         8
                84.90          2.51        1.1422    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.