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, 2nd run, T = 450 C
      _database_code_amcsd 0008787

      CELL PARAMETERS:    8.1302   8.1302   8.1302   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    537.408
      Density (g/cm3):      3.600
      MAX. ABS. INTENSITY / VOLUME**2:      19.36726332    
      RIR:      1.752
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.91         40.34        4.6940    1   1   1         8
                31.11         31.62        2.8745    2   2   0        12
                36.66        100.00        2.4513    3   1   1        24
                44.58         56.66        2.0326    4   0   0         6
                55.36          8.17        1.6596    4   2   2        24
                59.04          2.82        1.5647    3   3   3         8
                59.04         42.89        1.5647    5   1   1        24
                64.88         66.99        1.4372    4   4   0        12
                68.25          3.76        1.3743    5   3   1        48
                73.70          2.34        1.2855    6   2   0        24
                76.89          9.42        1.2398    5   3   3        24
                77.95          1.27        1.2257    6   2   2        24
                82.13          6.30        1.1735    4   4   4         8
                85.24          2.99        1.1385    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.