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 0008782

      CELL PARAMETERS:    8.1263   8.1263   8.1263   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    536.634
      Density (g/cm3):      3.605
      MAX. ABS. INTENSITY / VOLUME**2:      19.44514306    
      RIR:      1.756
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.91         40.65        4.6917    1   1   1         8
                31.13         31.67        2.8731    2   2   0        12
                36.68        100.00        2.4502    3   1   1        24
                44.60         56.95        2.0316    4   0   0         6
                55.39          8.20        1.6588    4   2   2        24
                59.07          2.80        1.5639    3   3   3         8
                59.07         43.39        1.5639    5   1   1        24
                64.91         67.69        1.4365    4   4   0        12
                68.28          3.84        1.3736    5   3   1        48
                73.74          2.35        1.2849    6   2   0        24
                76.94          9.53        1.2392    5   3   3        24
                77.99          1.27        1.2251    6   2   2        24
                82.18          6.43        1.1729    4   4   4         8
                85.30          3.09        1.1379    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.