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 = 4.511 GPa
      _database_code_amcsd 0017774

      CELL PARAMETERS:    5.3240  14.4380   5.5450   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    426.233
      Density (g/cm3):      3.988
      MAX. ABS. INTENSITY / VOLUME**2:      31.88586220    
      RIR:      2.603
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.26         21.91        7.2190    0   2   0         2
                17.13          3.58        5.1764    0   1   1         4
                23.16          8.77        3.8404    1   0   1         2
                24.49         10.80        3.6346    0   3   1         4
                24.66          5.40        3.6095    0   4   0         2
                26.29          3.47        3.3905    1   2   1         4
                32.29         34.28        2.7725    0   0   2         2
                33.67         42.57        2.6620    2   0   0         1
                34.09        100.00        2.6301    1   4   1         4
                35.04         10.20        2.5611    0   5   1         4
                37.09          4.01        2.4241    1   1   2         4
                41.05          1.96        2.1987    0   4   2         4
                42.07          5.52        2.1476    2   3   1         4
                42.18          1.75        2.1424    2   4   0         2
                44.43         18.86        2.0391    1   6   1         4
                47.34         40.43        1.9202    2   0   2         2
                48.63          2.93        1.8722    1   5   2         4
                49.09          8.87        1.8557    2   2   2         4
                50.58         16.96        1.8047    0   8   0         2
                51.17          1.73        1.7851    2   6   0         2
                53.08          7.60        1.7255    0   3   3         4
                55.87          2.14        1.6457    3   2   1         4
                56.33          2.63        1.6334    1   8   1         4
                58.40          2.57        1.5803    1   7   2         4
                58.74         17.00        1.5718    1   4   3         4
                59.37          2.54        1.5567    0   5   3         4
                60.48         19.39        1.5307    3   4   1         4
                61.29          6.33        1.5125    0   8   2         4
                62.14          8.11        1.4938    2   8   0         2
                62.47          2.56        1.4867    3   1   2         4
                64.34          3.89        1.4479    2   3   3         4
                66.12          3.91        1.4132    1   6   3         4
                67.58          1.94        1.3863    0   0   4         2
                67.75          4.65        1.3831    3   6   1         4
                68.98          3.48        1.3614    0   2   4         4
                69.56          2.44        1.3514    1  10   1         4
                70.01          3.47        1.3438    2   5   3         4
                70.50          1.71        1.3358    1   1   4         4
                70.79          4.26        1.3310    4   0   0         1
                71.01          1.08        1.3274    3   5   2         4
                71.78         11.52        1.3151    2   8   2         4
                72.17          1.78        1.3089    4   2   0         2
                77.66          1.18        1.2295    2   0   4         2
                78.64          1.02        1.2166    1   5   4         4
                78.99          1.02        1.2121    2   2   4         4
                79.13          1.65        1.2103    3   7   2         4
                79.43          4.51        1.2065    3   4   3         4
                79.96          2.82        1.1999    4   0   2         2
                83.83          2.60        1.1540    2  10   2         4
                84.36          3.35        1.1481    1  12   1         4
                86.02          2.37        1.1302    3   6   3         4
                86.55          2.34        1.1246    1   7   4         4
                89.21          1.36        1.0978    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.