Sillimanite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050601
      Winter J K, Ghose S
      American Mineralogist 64 (1979) 573-586
      Thermal expansion and high-temperature crystal chemistry of the Al2SiO5
      polymorphs
      T = 400 deg C

      CELL PARAMETERS:   7.486484   7.674338   5.772069   90.00000   90.00000   90.00000
      SPACE GROUP: Pbnm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                16.57         18.42        5.3589    1   1   0
                19.45          3.24        4.5712    1   0   1
                23.21          1.36        3.8372    0   2   0
                23.80          7.29        3.7432    2   0   0
                26.12         80.51        3.4148    1   2   0
                26.52        100.00        3.3644    2   1   0
                30.43          1.05        2.9390    1   2   1
                31.01         17.11        2.8860    0   0   2
                33.46         26.03        2.6795    2   2   0
                35.34         48.45        2.5410    1   1   2
                37.16         12.07        2.4207    1   3   0
                37.93          1.31        2.3732    3   1   0
                39.07          1.72        2.3065    0   2   2
                39.44          9.37        2.2856    2   0   2
                40.95         65.27        2.2042    1   2   2
                42.83         13.79        2.1120    2   3   0
                43.26          3.05        2.0920    3   2   0
                45.75          1.35        1.9834    2   3   1
                46.24          1.14        1.9636    2   2   2
                48.65          8.38        1.8716    4   0   0
                49.74          7.30        1.8330    3   1   2
                50.17          1.33        1.8183    4   1   0
                51.14          2.96        1.7863    3   3   0
                53.68          8.14        1.7074    2   4   0
                54.15          6.99        1.6938    3   2   2
                54.55         13.21        1.6822    4   2   0
                57.69         16.52        1.5977    0   4   2
                58.80          8.31        1.5703    4   0   2
                59.12          2.67        1.5626    1   4   2
                60.14          1.56        1.5384    4   1   2
                60.99         38.86        1.5189    3   3   2
                64.06          4.23        1.4533    4   2   2
                64.57         16.52        1.4430    0   0   4
                65.74          3.72        1.4201    2   5   0
                67.09          5.81        1.3949    5   2   0
                70.24          3.97        1.3397    4   4   0
                70.62         10.99        1.3335    1   5   2
                70.88          6.14        1.3292    1   2   4
                71.06          7.19        1.3262    2   1   4
                72.10          2.72        1.3096    5   1   2
                72.24          1.09        1.3074    3   5   0
                74.11          1.58        1.2791    0   6   0
                74.43         13.37        1.2742    2   5   2
                74.69          3.22        1.2705    2   2   4
                75.71         10.28        1.2559    5   2   2
                76.29          3.55        1.2477    6   0   0
                76.89          3.52        1.2395    1   3   4
                77.37          1.17        1.2330    3   1   4
                77.48          1.70        1.2316    6   1   0
                78.72          2.55        1.2152    4   4   2
                80.60          1.43        1.1915    2   3   4
                81.60          3.21        1.1794    5   3   2
                84.80          1.84        1.1428    4   0   4
                87.32          1.01        1.1162    2   6   2
                88.73          2.71        1.1021    2   4   4
                89.18          1.35        1.0976    4   5   2
                89.20          1.05        1.0975    6   2   2
                89.43          4.31        1.0953    4   2   4
                89.71          1.03        1.0925    5   4   2
                89.71          1.03        1.0925    5   4   2
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.