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: bht120n2
      Locality: synthetic
      _database_code_amcsd 0003440

      CELL PARAMETERS:    5.3269  14.4687   5.5433   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    427.241
      Density (g/cm3):      3.742
      MAX. ABS. INTENSITY / VOLUME**2:      25.07250242    
      RIR:      2.182
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.23         34.99        7.2344    0   2   0         2
                17.13          2.69        5.1764    0   1   1         4
                23.16          4.12        3.8409    1   0   1         2
                24.46         12.44        3.6385    0   3   1         4
                24.61          2.66        3.6172    0   4   0         2
                26.27          3.64        3.3924    1   2   1         4
                32.30         35.50        2.7717    0   0   2         2
                33.65         45.11        2.6635    2   0   0         1
                34.05        100.00        2.6333    1   4   1         4
                34.98         10.47        2.5652    0   5   1         4
                37.09          3.50        2.4240    1   1   2         4
                41.02          5.31        2.2000    0   4   2         4
                42.04          5.51        2.1492    2   3   1         4
                42.13          4.84        2.1447    2   4   0         2
                44.35         25.60        2.0423    1   6   1         4
                47.33         45.95        1.9205    2   0   2         2
                48.59          2.50        1.8737    1   5   2         4
                49.08         11.53        1.8562    2   2   2         4
                50.46         18.86        1.8086    0   8   0         2
                51.09          1.47        1.7876    2   6   0         2
                53.08          7.63        1.7255    0   3   3         4
                55.83          1.60        1.6466    3   2   1         4
                56.22          1.72        1.6363    1   8   1         4
                58.32          2.80        1.5822    1   7   2         4
                58.73         17.64        1.5722    1   4   3         4
                59.34          2.52        1.5574    0   5   3         4
                60.43         19.85        1.5319    3   4   1         4
                61.19          6.19        1.5146    0   8   2         4
                62.03          8.14        1.4962    2   8   0         2
                62.45          2.36        1.4872    3   1   2         4
                64.33          4.15        1.4481    2   3   3         4
                66.07          4.95        1.4141    1   6   3         4
                67.60          2.34        1.3858    0   0   4         2
                67.67          5.64        1.3845    3   6   1         4
                69.00          4.01        1.3611    0   2   4         4
                69.41          2.83        1.3540    1  10   1         4
                69.98          3.52        1.3444    2   5   3         4
                70.52          1.61        1.3355    1   1   4         4
                70.74          4.98        1.3317    4   0   0         1
                70.95          1.11        1.3283    3   5   2         4
                71.68         13.18        1.3166    2   8   2         4
                72.12          2.22        1.3097    4   2   0         2
                73.89          1.01        1.2826    0  10   2         4
                77.67          1.33        1.2294    2   0   4         2
                79.04          1.75        1.2114    3   7   2         4
                79.40          4.71        1.2069    3   4   3         4
                79.92          3.29        1.2004    4   0   2         2
                83.69          3.43        1.1556    2  10   2         4
                84.16          3.59        1.1504    1  12   1         4
                85.96          3.04        1.1308    3   6   3         4
                86.50          2.62        1.1251    1   7   4         4
                88.99          1.22        1.1000    0   8   4         4
                89.05          1.50        1.0994    3  10   1         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.