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, 1st run, T = 400 C
      _database_code_amcsd 0008797

      CELL PARAMETERS:    8.1316   8.1316   8.1316   90.000   90.000   90.000
      SPACE GROUP: Fd3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    537.685
      Density (g/cm3):      3.623
      MAX. ABS. INTENSITY / VOLUME**2:      19.91755214    
      RIR:      1.790
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                18.90         42.01        4.6948    1   1   1         8
                31.11         30.86        2.8750    2   2   0        12
                36.65        100.00        2.4518    3   1   1        24
                44.57         57.35        2.0329    4   0   0         6
                55.35          7.97        1.6599    4   2   2        24
                59.03          2.81        1.5649    3   3   3         8
                59.03         43.37        1.5649    5   1   1        24
                64.86         67.70        1.4375    4   4   0        12
                68.23          4.08        1.3745    5   3   1        48
                73.68          2.27        1.2857    6   2   0        24
                76.88          9.57        1.2401    5   3   3        24
                77.93          1.38        1.2259    6   2   2        24
                82.12          6.60        1.1737    4   4   4         8
                85.23          3.23        1.1387    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.