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 = 1.49 GPa
      _database_code_amcsd 0017772

      CELL PARAMETERS:    5.3610  14.5523   5.5958   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    436.556
      Density (g/cm3):      3.894
      MAX. ABS. INTENSITY / VOLUME**2:      30.57104102    
      RIR:      2.556
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.16         22.61        7.2762    0   2   0         2
                16.98          3.58        5.2230    0   1   1         4
                22.97          9.14        3.8711    1   0   1         2
                24.28         11.62        3.6653    0   3   1         4
                24.47          5.62        3.6381    0   4   0         2
                26.07          3.63        3.4176    1   2   1         4
                31.99         34.95        2.7979    0   0   2         2
                33.43         42.87        2.6805    2   0   0         1
                33.81        100.00        2.6511    1   4   1         4
                34.74          9.64        2.5821    0   5   1         4
                36.76          4.09        2.4451    1   1   2         4
                40.68          2.12        2.2179    0   4   2         4
                40.86          1.06        2.2084    1   3   2         4
                41.75          5.31        2.1637    2   3   1         4
                41.86          1.96        2.1580    2   4   0         2
                44.06         19.36        2.0553    1   6   1         4
                46.94         40.94        1.9356    2   0   2         2
                48.20          3.02        1.8878    1   5   2         4
                48.68          9.14        1.8705    2   2   2         4
                50.15         17.27        1.8190    0   8   0         2
                50.76          1.71        1.7985    2   6   0         2
                52.57          7.60        1.7410    0   3   3         4
                55.43          1.89        1.6575    3   2   1         4
                55.84          2.80        1.6463    1   8   1         4
                57.87          2.67        1.5933    1   7   2         4
                58.18         16.43        1.5856    1   4   3         4
                58.80          2.68        1.5704    0   5   3         4
                60.00         19.10        1.5419    3   4   1         4
                60.73          6.14        1.5251    0   8   2         4
                61.62          7.87        1.5052    2   8   0         2
                61.94          2.52        1.4980    3   1   2         4
                63.74          4.03        1.4601    2   3   3         4
                65.48          4.09        1.4254    1   6   3         4
                66.88          1.97        1.3989    0   0   4         2
                67.18          4.70        1.3934    3   6   1         4
                68.27          3.53        1.3738    0   2   4         4
                68.94          2.50        1.3622    1  10   1         4
                69.35          3.38        1.3550    2   5   3         4
                69.78          1.66        1.3478    1   1   4         4
                70.23          4.26        1.3403    4   0   0         1
                70.39          1.10        1.3376    3   5   2         4
                71.12         11.64        1.3255    2   8   2         4
                71.59          1.82        1.3181    4   2   0         2
                76.87          1.15        1.2402    2   0   4         2
                77.82          1.05        1.2274    1   5   4         4
                78.41          1.58        1.2196    3   7   2         4
                78.68          4.39        1.2161    3   4   3         4
                79.25          2.79        1.2087    4   0   2         2
                83.02          2.65        1.1632    2  10   2         4
                83.54          3.24        1.1572    1  12   1         4
                85.18          2.38        1.1392    3   6   3         4
                85.63          2.27        1.1344    1   7   4         4
                88.36          1.27        1.1061    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.