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, 1st run, T = 400 C
      _database_code_amcsd 0008784

      CELL PARAMETERS:    8.1265   8.1265   8.1265   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.674
      Density (g/cm3):      3.605
      MAX. ABS. INTENSITY / VOLUME**2:      19.46448951    
      RIR:      1.758
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.91         40.11        4.6918    1   1   1         8
                31.13         31.56        2.8732    2   2   0        12
                36.68        100.00        2.4502    3   1   1        24
                44.60         56.79        2.0316    4   0   0         6
                55.39          8.21        1.6588    4   2   2        24
                59.07          2.84        1.5639    3   3   3         8
                59.07         43.03        1.5639    5   1   1        24
                64.91         67.48        1.4366    4   4   0        12
                68.28          3.78        1.3736    5   3   1        48
                73.74          2.37        1.2849    6   2   0        24
                76.93          9.50        1.2393    5   3   3        24
                77.99          1.26        1.2251    6   2   2        24
                82.18          6.39        1.1730    4   4   4         8
                85.29          3.03        1.1379    5   5   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.