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: L-Fe, 3rd run, T = 700 C
      _database_code_amcsd 0008821

      CELL PARAMETERS:    8.1469   8.1469   8.1469   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    540.726
      Density (g/cm3):      3.545
      MAX. ABS. INTENSITY / VOLUME**2:      18.75239862    
      RIR:      1.722
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.87         29.51        4.7036    1   1   1         8
                31.05         33.65        2.8804    2   2   0        12
                36.58        100.00        2.4564    3   1   1        24
                44.48         52.17        2.0367    4   0   0         6
                55.24          8.94        1.6630    4   2   2        24
                58.90         38.98        1.5679    5   1   1        24
                58.90          3.14        1.5679    3   3   3         8
                64.73         63.56        1.4402    4   4   0        12
                68.09          2.61        1.3771    5   3   1        48
                73.52          2.65        1.2881    6   2   0        24
                76.71          8.73        1.2424    5   3   3        24
                81.93          5.37        1.1759    4   4   4         8
                85.03          2.07        1.1408    5   5   1        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.