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: bht120_6
      Locality: synthetic
      _database_code_amcsd 0003436

      CELL PARAMETERS:    5.3569  14.5407   5.5735   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    434.137
      Density (g/cm3):      3.810
      MAX. ABS. INTENSITY / VOLUME**2:      28.10367204    
      RIR:      2.402
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.17         27.66        7.2703    0   2   0         2
                17.04          3.09        5.2043    0   1   1         4
                23.03          6.65        3.8622    1   0   1         2
                24.34         11.93        3.6574    0   3   1         4
                24.49          4.22        3.6352    0   4   0         2
                26.13          3.76        3.4108    1   2   1         4
                32.12         34.61        2.7868    0   0   2         2
                33.46         43.93        2.6785    2   0   0         1
                33.86        100.00        2.6471    1   4   1         4
                34.80         10.16        2.5783    0   5   1         4
                36.88          3.77        2.4373    1   1   2         4
                40.80          3.22        2.2116    0   4   2         4
                41.80          5.56        2.1609    2   3   1         4
                41.90          2.95        2.1563    2   4   0         2
                44.12         22.00        2.0528    1   6   1         4
                47.06         42.93        1.9311    2   0   2         2
                48.32          2.75        1.8836    1   5   2         4
                48.79         10.37        1.8664    2   2   2         4
                50.19         17.98        1.8176    0   8   0         2
                50.81          1.55        1.7970    2   6   0         2
                52.77          7.66        1.7348    0   3   3         4
                55.50          1.80        1.6558    3   2   1         4
                55.91          2.32        1.6446    1   8   1         4
                57.99          2.80        1.5904    1   7   2         4
                58.38         17.12        1.5807    1   4   3         4
                59.00          2.58        1.5656    0   5   3         4
                60.07         19.56        1.5403    3   4   1         4
                60.85          6.21        1.5224    0   8   2         4
                61.67          8.15        1.5040    2   8   0         2
                62.06          2.47        1.4955    3   1   2         4
                63.94          4.15        1.4560    2   3   3         4
                65.68          4.43        1.4216    1   6   3         4
                67.18          2.11        1.3934    0   0   4         2
                67.26          5.17        1.3920    3   6   1         4
                68.57          3.78        1.3685    0   2   4         4
                69.01          2.60        1.3608    1  10   1         4
                69.55          3.51        1.3517    2   5   3         4
                70.08          1.71        1.3427    1   1   4         4
                70.29          4.62        1.3392    4   0   0         1
                70.51          1.11        1.3355    3   5   2         4
                71.25         12.39        1.3235    2   8   2         4
                71.65          2.07        1.3171    4   2   0         2
                77.17          1.21        1.2361    2   0   4         2
                78.12          1.01        1.2234    1   5   4         4
                78.49          1.00        1.2186    2   2   4         4
                78.54          1.68        1.2179    3   7   2         4
                78.88          4.62        1.2135    3   4   3         4
                79.39          3.06        1.2071    4   0   2         2
                83.16          3.02        1.1616    2  10   2         4
                83.64          3.51        1.1562    1  12   1         4
                85.39          2.69        1.1369    3   6   3         4
                85.94          2.50        1.1311    1   7   4         4
                88.40          1.10        1.1058    0   8   4         4
                88.47          1.35        1.1051    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.