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: Ch1, annealed at T = 850 C, ordering, t = 1440 m
      _database_code_amcsd 0004085

      CELL PARAMETERS:    8.0919   8.0919   8.0919   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    529.848
      Density (g/cm3):      3.586
      MAX. ABS. INTENSITY / VOLUME**2:      19.02323091    
      RIR:      1.727
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                19.00         32.52        4.6719    1   1   1         8
                31.26         32.32        2.8609    2   2   0        12
                36.84        100.00        2.4398    3   1   1        24
                44.80         55.31        2.0230    4   0   0         6
                55.64          8.83        1.6518    4   2   2        24
                59.34          3.18        1.5573    3   3   3         8
                59.34         40.95        1.5573    5   1   1        24
                65.22         67.42        1.4305    4   4   0        12
                68.61          3.08        1.3678    5   3   1        48
                74.10          2.71        1.2794    6   2   0        24
                77.32          9.45        1.2340    5   3   3        24
                78.39          1.05        1.2199    6   2   2        24
                82.61          6.10        1.1680    4   4   4         8
                85.74          2.46        1.1331    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.