Brownmillerite
      Vanpeteghem C B, Angel R J, Zhao J, Ross N L, Redhammer G J, Seifert F
      Physics and Chemistry of Minerals 35 (2008) 493-504
      The effect of oxygen vacancies and aluminium substitution on the
      high-pressure properties of brownmillerite-structured Ca2Fe2-xAlxO5
      Locality: synthetic
      Note: x = 0.55
      Note: P = 7.73 GPa
      _database_code_amcsd 0017776

      CELL PARAMETERS:    5.2866  14.3321   5.5163   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    417.959
      Density (g/cm3):      4.067
      MAX. ABS. INTENSITY / VOLUME**2:      32.20821068    
      RIR:      2.578
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.35         22.71        7.1660    0   2   0         2
                17.22          3.47        5.1481    0   1   1         4
                23.31          8.68        3.8168    1   0   1         2
                24.65         10.76        3.6113    0   3   1         4
                24.85          5.44        3.5830    0   4   0         2
                26.46          3.12        3.3688    1   2   1         4
                32.46         34.77        2.7582    0   0   2         2
                33.91         42.52        2.6433    2   0   0         1
                34.33        100.00        2.6123    1   4   1         4
                35.29          9.96        2.5435    0   5   1         4
                37.30          3.94        2.4105    1   1   2         4
                41.31          1.85        2.1856    0   4   2         4
                42.38          5.57        2.1330    2   3   1         4
                42.50          1.95        2.1271    2   4   0         2
                44.76         18.77        2.0248    1   6   1         4
                47.65         39.92        1.9084    2   0   2         2
                48.96          2.78        1.8604    1   5   2         4
                49.42          8.93        1.8441    2   2   2         4
                50.98         16.62        1.7915    0   8   0         2
                51.57          1.58        1.7723    2   6   0         2
                53.39          7.57        1.7160    0   3   3         4
                56.29          1.43        1.6344    3   2   1         4
                56.77          2.75        1.6218    1   8   1         4
                58.82          2.48        1.5698    1   7   2         4
                59.11         16.53        1.5628    1   4   3         4
                59.75          2.51        1.5477    0   5   3         4
                60.95         19.79        1.5201    3   4   1         4
                61.74          6.19        1.5024    0   8   2         4
                62.64          7.92        1.4830    2   8   0         2
                62.92          2.60        1.4771    3   1   2         4
                64.77          3.80        1.4393    2   3   3         4
                66.57          3.83        1.4047    1   6   3         4
                67.97          1.94        1.3791    0   0   4         2
                68.29          4.28        1.3734    3   6   1         4
                69.40          3.40        1.3542    0   2   4         4
                70.14          2.31        1.3417    1  10   1         4
                70.51          3.32        1.3356    2   5   3         4
                70.93          1.64        1.3287    1   1   4         4
                71.37          4.02        1.3217    4   0   0         1
                72.34         11.12        1.3062    2   8   2         4
                72.76          1.74        1.2997    4   2   0         2
                78.18          1.16        1.2227    2   0   4         2
                79.78          1.50        1.2021    3   7   2         4
                80.03          4.56        1.1989    3   4   3         4
                80.60          2.75        1.1919    4   0   2         2
                84.55          2.52        1.1460    2  10   2         4
                85.12          3.15        1.1398    1  12   1         4
                86.71          2.26        1.1229    3   6   3         4
                87.20          2.17        1.1179    1   7   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.