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: H-Cr, 3rd run, T = 600 C
      _database_code_amcsd 0008804

      CELL PARAMETERS:    8.1482   8.1482   8.1482   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.985
      Density (g/cm3):      3.601
      MAX. ABS. INTENSITY / VOLUME**2:      19.44005886    
      RIR:      1.758
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.86         42.39        4.7044    1   1   1         8
                31.04         30.87        2.8808    2   2   0        12
                36.58        100.00        2.4568    3   1   1        24
                44.48         56.97        2.0371    4   0   0         6
                55.23          7.73        1.6632    4   2   2        24
                58.89          2.77        1.5681    3   3   3         8
                58.89         42.06        1.5681    5   1   1        24
                64.72         65.25        1.4404    4   4   0        12
                68.07          4.00        1.3773    5   3   1        48
                73.51          2.14        1.2883    6   2   0        24
                76.69          9.06        1.2426    5   3   3        24
                77.74          1.38        1.2284    6   2   2        24
                81.91          6.25        1.1761    4   4   4         8
                85.01          3.04        1.1410    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.