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: bht070_1
      Locality: synthetic
      _database_code_amcsd 0003435

      CELL PARAMETERS:    5.3714  14.5805   5.5847   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    437.381
      Density (g/cm3):      3.837
      MAX. ABS. INTENSITY / VOLUME**2:      29.70049863    
      RIR:      2.520
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.14         26.31        7.2902    0   2   0         2
                17.00          3.27        5.2152    0   1   1         4
                22.97          7.84        3.8714    1   0   1         2
                24.28         11.53        3.6662    0   3   1         4
                24.42          4.99        3.6451    0   4   0         2
                26.06          3.75        3.4192    1   2   1         4
                32.05         34.44        2.7924    0   0   2         2
                33.36         43.66        2.6857    2   0   0         1
                33.77        100.00        2.6539    1   4   1         4
                34.70          9.83        2.5849    0   5   1         4
                36.80          3.79        2.4426    1   1   2         4
                40.70          2.50        2.2167    0   4   2         4
                41.69          5.55        2.1666    2   3   1         4
                41.78          2.27        2.1622    2   4   0         2
                43.99         21.03        2.0582    1   6   1         4
                46.94         42.21        1.9357    2   0   2         2
                48.20          2.86        1.8881    1   5   2         4
                48.67         10.18        1.8709    2   2   2         4
                50.05         17.84        1.8226    0   8   0         2
                50.66          1.63        1.8019    2   6   0         2
                52.65          7.62        1.7384    0   3   3         4
                55.34          1.93        1.6602    3   2   1         4
                55.75          2.78        1.6490    1   8   1         4
                57.83          2.76        1.5943    1   7   2         4
                58.24         17.26        1.5841    1   4   3         4
                58.85          2.60        1.5691    0   5   3         4
                59.89         19.80        1.5444    3   4   1         4
                60.68          6.35        1.5262    0   8   2         4
                61.49          8.34        1.5081    2   8   0         2
                61.89          2.54        1.4992    3   1   2         4
                63.78          4.20        1.4594    2   3   3         4
                65.51          4.41        1.4248    1   6   3         4
                67.03          2.12        1.3962    0   0   4         2
                67.06          5.17        1.3957    3   6   1         4
                68.42          3.78        1.3713    0   2   4         4
                68.80          2.55        1.3645    1  10   1         4
                69.36          3.55        1.3548    2   5   3         4
                69.91          1.78        1.3455    1   1   4         4
                70.07          4.61        1.3428    4   0   0         1
                70.31          1.14        1.3390    3   5   2         4
                71.04         12.46        1.3269    2   8   2         4
                71.43          2.07        1.3206    4   2   0         2
                76.97          1.23        1.2388    2   0   4         2
                77.92          1.09        1.2260    1   5   4         4
                78.28          1.08        1.2213    2   2   4         4
                78.30          1.68        1.2211    3   7   2         4
                78.65          4.80        1.2165    3   4   3         4
                79.14          3.09        1.2102    4   0   2         2
                82.90          3.02        1.1646    2  10   2         4
                83.36          3.60        1.1593    1  12   1         4
                85.13          2.67        1.1397    3   6   3         4
                85.70          2.51        1.1336    1   7   4         4
                88.14          1.11        1.1083    0   8   4         4
                88.17          1.35        1.1081    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.