Spinel
      Princivalle F, Martignago F, Dal Negro A
      American Mineralogist 91 (2006) 313-318
      Kinetics of cation ordering in natural Mg(Al,Cr3+)2O4 spinels
      Locality: Olkhon metamorphic complex, Lake Baikal, Russia
      Sample: Ch, annealed at T = 650 C, ordering, t = 120 m
      _database_code_amcsd 0004071

      CELL PARAMETERS:    8.0876   8.0876   8.0876   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    529.004
      Density (g/cm3):      3.576
      MAX. ABS. INTENSITY / VOLUME**2:      18.70991609    
      RIR:      1.704
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.01         32.27        4.6694    1   1   1         8
                31.28         32.98        2.8594    2   2   0        12
                36.86        100.00        2.4385    3   1   1        24
                44.83         55.36        2.0219    4   0   0         6
                55.68          8.96        1.6509    4   2   2        24
                59.38          3.13        1.5565    3   3   3         8
                59.38         41.45        1.5565    5   1   1        24
                65.26         67.84        1.4297    4   4   0        12
                68.66          3.04        1.3671    5   3   1        48
                74.15          2.73        1.2788    6   2   0        24
                77.37          9.50        1.2333    5   3   3        24
                78.44          1.01        1.2193    6   2   2        24
                82.66          6.10        1.1673    4   4   4         8
                85.80          2.49        1.1325    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.