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, 2nd run, T = 500 C
      _database_code_amcsd 0008801

      CELL PARAMETERS:    8.1400   8.1400   8.1400   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    539.353
      Density (g/cm3):      3.612
      MAX. ABS. INTENSITY / VOLUME**2:      19.69700602    
      RIR:      1.776
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.88         42.19        4.6996    1   1   1         8
                31.08         30.87        2.8779    2   2   0        12
                36.61        100.00        2.4543    3   1   1        24
                44.52         57.13        2.0350    4   0   0         6
                55.29          7.86        1.6616    4   2   2        24
                58.96         42.77        1.5665    5   1   1        24
                58.96          2.80        1.5665    3   3   3         8
                64.79         66.54        1.4390    4   4   0        12
                68.15          4.04        1.3759    5   3   1        48
                73.59          2.21        1.2870    6   2   0        24
                76.78          9.34        1.2413    5   3   3        24
                77.84          1.39        1.2272    6   2   2        24
                82.01          6.43        1.1749    4   4   4         8
                85.12          3.13        1.1398    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.