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: bht110n1
      Locality: synthetic
      _database_code_amcsd 0003439

      CELL PARAMETERS:    5.3369  14.4945   5.5548   90.000   90.000   90.000
      SPACE GROUP: I2mb      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    429.695
      Density (g/cm3):      3.762
      MAX. ABS. INTENSITY / VOLUME**2:      26.18710401    
      RIR:      2.267
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                12.21         33.64        7.2473    0   2   0         2
                17.09          2.79        5.1869    0   1   1         4
                23.11          4.89        3.8485    1   0   1         2
                24.42         12.06        3.6455    0   3   1         4
                24.57          3.19        3.6236    0   4   0         2
                26.22          3.78        3.3990    1   2   1         4
                32.23         35.05        2.7774    0   0   2         2
                33.58         44.51        2.6685    2   0   0         1
                33.98        100.00        2.6382    1   4   1         4
                34.91         10.39        2.5700    0   5   1         4
                37.01          3.53        2.4289    1   1   2         4
                40.94          4.55        2.2044    0   4   2         4
                41.96          5.46        2.1532    2   3   1         4
                42.05          4.15        2.1487    2   4   0         2
                44.27         25.21        2.0461    1   6   1         4
                47.24         45.20        1.9242    2   0   2         2
                48.49          2.57        1.8773    1   5   2         4
                48.98         11.44        1.8598    2   2   2         4
                50.36         18.47        1.8118    0   8   0         2
                50.99          1.41        1.7909    2   6   0         2
                52.96          7.58        1.7290    0   3   3         4
                55.72          1.61        1.6497    3   2   1         4
                56.11          1.92        1.6392    1   8   1         4
                58.20          2.85        1.5852    1   7   2         4
                58.60         17.70        1.5753    1   4   3         4
                59.21          2.49        1.5605    0   5   3         4
                60.31         19.95        1.5347    3   4   1         4
                61.06          6.17        1.5175    0   8   2         4
                61.62          1.00        1.5051    2   6   2         4
                61.90          8.11        1.4989    2   8   0         2
                62.31          2.38        1.4901    3   1   2         4
                64.19          4.12        1.4510    2   3   3         4
                65.93          4.95        1.4168    1   6   3         4
                67.44          2.31        1.3887    0   0   4         2
                67.53          5.65        1.3871    3   6   1         4
                68.84          4.04        1.3639    0   2   4         4
                69.27          2.77        1.3564    1  10   1         4
                69.82          3.52        1.3470    2   5   3         4
                70.35          1.65        1.3382    1   1   4         4
                70.59          4.94        1.3342    4   0   0         1
                70.80          1.14        1.3308    3   5   2         4
                71.53         13.01        1.3191    2   8   2         4
                71.96          2.25        1.3122    4   2   0         2
                73.73          1.03        1.2850    0  10   2         4
                77.48          1.33        1.2319    2   0   4         2
                78.81          1.02        1.2144    2   2   4         4
                78.87          1.76        1.2137    3   7   2         4
                79.21          4.75        1.2093    3   4   3         4
                79.74          3.30        1.2027    4   0   2         2
                83.50          3.42        1.1577    2  10   2         4
                83.97          3.63        1.1524    1  12   1         4
                85.75          3.07        1.1330    3   6   3         4
                86.29          2.64        1.1273    1   7   4         4
                88.77          1.21        1.1022    0   8   4         4
                88.85          1.48        1.1014    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.