Brownmillerite
      Redhammer G J, Tippelt G, Roth G, Amthauer G
      American Mineralogist 89 (2004) 405-420
      Structural variations in the brownmillerite series Ca2(Fe2-xAlx)O5:
      Single-crystal X-ray diffraction at 25 deg C and high temperature
      X-ray powder diffraction (25 C <= T <= 1000 C)
      Sample: bht130_2
      Locality: synthetic
      _database_code_amcsd 0003441

      CELL PARAMETERS:    5.3093  14.4534   5.5230   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    423.821
      Density (g/cm3):      3.690
      MAX. ABS. INTENSITY / VOLUME**2:      23.09524448    
      RIR:      2.038
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.25         38.93        7.2267    0   2   0         2
                17.19          2.51        5.1592    0   1   1         4
                23.24          2.69        3.8276    1   0   1         2
                24.52         13.01        3.6306    0   3   1         4
                24.64          1.83        3.6133    0   4   0         2
                26.35          3.42        3.3824    1   2   1         4
                32.42         35.78        2.7615    0   0   2         2
                33.76         45.84        2.6546    2   0   0         1
                34.12        100.00        2.6275    1   4   1         4
                35.04         10.91        2.5611    0   5   1         4
                37.22          3.38        2.4155    1   1   2         4
                41.14          7.04        2.1941    0   4   2         4
                42.17          5.60        2.1429    2   3   1         4
                42.24          6.45        2.1393    2   4   0         2
                44.44         27.94        2.0387    1   6   1         4
                47.51         47.72        1.9138    2   0   2         2
                48.72          2.42        1.8690    1   5   2         4
                49.25         12.10        1.8500    2   2   2         4
                50.52         19.38        1.8067    0   8   0         2
                51.21          1.61        1.7839    2   6   0         2
                53.27          7.67        1.7197    0   3   3         4
                56.03          1.45        1.6413    3   2   1         4
                56.31          1.41        1.6338    1   8   1         4
                58.46          2.80        1.5788    1   7   2         4
                58.93         18.05        1.5673    1   4   3         4
                59.53          2.46        1.5528    0   5   3         4
                60.63         20.09        1.5274    3   4   1         4
                61.32          6.03        1.5119    0   8   2         4
                62.15          8.01        1.4936    2   8   0         2
                62.68          2.33        1.4822    3   1   2         4
                64.57          4.17        1.4433    2   3   3         4
                66.28          5.16        1.4102    1   6   3         4
                67.87          5.88        1.3809    3   6   1         4
                67.88          2.44        1.3807    0   0   4         2
                69.28          4.09        1.3562    0   2   4         4
                69.52          3.17        1.3521    1  10   1         4
                70.22          3.50        1.3404    2   5   3         4
                70.81          1.58        1.3306    1   1   4         4
                71.01          5.15        1.3273    4   0   0         1
                71.19          1.12        1.3244    3   5   2         4
                71.86         13.45        1.3137    2   8   2         4
                72.39          2.29        1.3055    4   2   0         2
                74.03          1.09        1.2805    0  10   2         4
                78.00          1.37        1.2250    2   0   4         2
                79.29          1.79        1.2083    3   7   2         4
                79.70          4.73        1.2031    3   4   3         4
                80.24          3.40        1.1963    4   0   2         2
                83.89          3.70        1.1534    2  10   2         4
                84.29          3.45        1.1489    1  12   1         4
                86.28          3.23        1.1275    3   6   3         4
                86.82          2.70        1.1219    1   7   4         4
                89.28          1.65        1.0971    3  10   1         4
                89.29          1.25        1.0971    0   8   4         4
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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.