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 = 0.0001 GPa
      _database_code_amcsd 0017771

      CELL PARAMETERS:    5.3830  14.6100   5.5920   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    439.786
      Density (g/cm3):      3.865
      MAX. ABS. INTENSITY / VOLUME**2:      30.33303969    
      RIR:      2.555
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.12         22.92        7.3050    0   2   0         2
                16.98          3.78        5.2225    0   1   1         4
                22.93          9.34        3.8781    1   0   1         2
                24.23         12.07        3.6725    0   3   1         4
                24.37          5.60        3.6525    0   4   0         2
                26.01          3.33        3.4254    1   2   1         4
                32.01         33.82        2.7960    0   0   2         2
                33.29         43.56        2.6915    2   0   0         1
                33.71        100.00        2.6589    1   4   1         4
                34.64          9.90        2.5898    0   5   1         4
                36.74          4.00        2.4462    1   1   2         4
                40.64          2.28        2.2202    0   4   2         4
                40.82          1.01        2.2108    1   3   2         4
                41.60          5.61        2.1709    2   3   1         4
                41.68          1.94        2.1668    2   4   0         2
                43.90         19.06        2.0622    1   6   1         4
                46.85         41.07        1.9391    2   0   2         2
                48.11          3.03        1.8913    1   5   2         4
                48.58          9.31        1.8742    2   2   2         4
                49.94         17.55        1.8262    0   8   0         2
                50.55          1.71        1.8057    2   6   0         2
                52.57          7.50        1.7408    0   3   3         4
                55.21          1.81        1.6636    3   2   1         4
                55.63          2.92        1.6522    1   8   1         4
                57.72          2.69        1.5972    1   7   2         4
                58.14         16.36        1.5865    1   4   3         4
                58.76          2.59        1.5715    0   5   3         4
                59.75         19.08        1.5476    3   4   1         4
                60.56          6.05        1.5290    0   8   2         4
                61.35          8.09        1.5112    2   8   0         2
                61.76          2.48        1.5021    3   1   2         4
                63.66          4.16        1.4617    2   3   3         4
                65.39          4.02        1.4271    1   6   3         4
                66.90          4.58        1.3986    3   6   1         4
                66.93          1.94        1.3980    0   0   4         2
                68.31          3.53        1.3731    0   2   4         4
                68.65          2.48        1.3672    1  10   1         4
                69.23          3.49        1.3571    2   5   3         4
                69.80          1.71        1.3473    1   1   4         4
                69.90          4.46        1.3457    4   0   0         1
                70.15          1.14        1.3415    3   5   2         4
                70.88         11.83        1.3294    2   8   2         4
                71.25          1.79        1.3235    4   2   0         2
                76.84          1.09        1.2406    2   0   4         2
                77.78          1.08        1.2279    1   5   4         4
                78.12          1.61        1.2235    3   7   2         4
                78.49          4.34        1.2186    3   4   3         4
                78.95          2.89        1.2126    4   0   2         2
                82.70          2.67        1.1669    2  10   2         4
                83.16          3.24        1.1616    1  12   1         4
                84.94          2.40        1.1418    3   6   3         4
                85.53          2.31        1.1354    1   7   4         4
                87.94          1.27        1.1104    3  10   1         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.