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 = 550 C
      _database_code_amcsd 0008773

      CELL PARAMETERS:    8.1298   8.1298   8.1298   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    537.328
      Density (g/cm3):      3.560
      MAX. ABS. INTENSITY / VOLUME**2:      18.43569411    
      RIR:      1.686
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.91         39.24        4.6937    1   1   1         8
                31.12         33.04        2.8743    2   2   0        12
                36.66        100.00        2.4512    3   1   1        24
                44.58         57.43        2.0324    4   0   0         6
                55.36          8.34        1.6595    4   2   2        24
                59.04         43.59        1.5646    5   1   1        24
                59.04          2.66        1.5646    3   3   3         8
                64.88         67.99        1.4372    4   4   0        12
                68.25          3.69        1.3742    5   3   1        48
                73.70          2.32        1.2854    6   2   0        24
                76.90          9.31        1.2398    5   3   3        24
                77.95          1.03        1.2256    6   2   2        24
                82.14          6.39        1.1734    4   4   4         8
                85.25          3.08        1.1384    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.