Topaz
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050200
      Northrup P A, Leinenweber K, Parise J B
      American Mineralogist 79 (1994) 401-404
      The location of H in the high-pressure synthetic Al2SiO4(OH)2 topaz analogue
      Sample fluor-topaz from a Mexican rhyolite

      CELL PARAMETERS:   4.648816   8.795297   8.391391   90.00000   90.00000   90.00000
      SPACE GROUP: Pbnm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                20.22          3.97        4.3976    0   2   0
                21.20          1.95        4.1957    0   0   2
                21.64          8.83        4.1100    1   1   0
                22.85          4.70        3.8952    0   2   1
                24.13         74.81        3.6911    1   1   1
                27.95         86.00        3.1947    1   2   0
                29.44         39.61        3.0357    0   2   2
                29.94         20.63        2.9857    1   2   1
                30.46        100.00        2.9360    1   1   2
                36.23         23.22        2.4798    1   3   0
                37.53          8.23        2.3967    1   0   3
                37.84         17.27        2.3781    1   3   1
                38.14         49.10        2.3602    0   2   3
                38.96          8.01        2.3124    1   1   3
                40.13          3.41        2.2473    2   1   0
                41.05          9.67        2.1988    0   4   0
                41.61         13.25        2.1708    2   1   1
                42.50          4.53        2.1270    0   4   1
                42.98         55.18        2.1045    1   2   3
                43.12          1.38        2.0978    0   0   4
                44.07         29.23        2.0550    2   2   0
                45.64          7.30        1.9877    1   4   0
                45.80          2.11        1.9810    2   1   2
                46.64          1.54        1.9476    0   4   2
                46.98          4.58        1.9342    1   4   1
                48.73         24.63        1.8685    1   1   4
                49.09         26.62        1.8556    1   3   3
                50.08         11.69        1.8214    2   3   0
                50.83          6.43        1.7963    1   4   2
                51.33          5.51        1.7800    2   3   1
                54.95         32.96        1.6708    2   3   2
                55.48          8.28        1.6561    2   2   3
                56.81         13.77        1.6203    1   4   3
                57.70          2.40        1.5974    2   4   0
                58.45          1.46        1.5786    1   0   5
                60.35         10.64        1.5335    2   1   4
                60.66         20.14        1.5263    2   3   3
                61.03          4.24        1.5178    0   4   4
                62.17          1.11        1.4928    2   4   2
                62.50          2.85        1.4857    1   2   5
                63.65         10.44        1.4615    3   2   0
                64.52          5.12        1.4440    0   6   1
                64.57          2.66        1.4429    1   4   4
                64.73          1.94        1.4398    3   2   1
                65.01          4.46        1.4342    3   1   2
                65.84         38.22        1.4181    1   5   3
                66.66         24.37        1.4027    2   5   0
                66.88         23.76        1.3986    0   0   6
                67.35          8.65        1.3899    1   3   5
                67.51          1.29        1.3871    2   4   3
                67.71          3.85        1.3835    2   5   1
                68.16          4.98        1.3754    2   3   4
                69.30         37.57        1.3555    3   0   3
                69.50          1.21        1.3521    3   3   1
                69.94          4.49        1.3447    2   1   5
                70.65          1.01        1.3328    0   2   6
                71.05          5.14        1.3263    1   6   2
                72.82          4.26        1.2984    0   6   3
                73.96          7.92        1.2812    1   2   6
                74.66          2.45        1.2709    2   4   4
                75.85          2.07        1.2539    2   5   3
                75.95          1.46        1.2525    3   4   1
                76.08          6.31        1.2505    1   6   3
                76.85          2.59        1.2399    2   6   0
                77.28          3.15        1.2341    3   1   4
                77.84          1.37        1.2266    2   6   1
                78.48          4.48        1.2182    1   3   6
                78.89          5.21        1.2129    1   7   0
                78.91          1.59        1.2126    3   4   2
                79.78          3.20        1.2016    0   6   4
                82.73          1.33        1.1660    2   5   4
                82.96          2.46        1.1634    1   6   4
                83.06          2.38        1.1622    4   0   0
                83.59          3.15        1.1562    2   2   6
                84.07          5.08        1.1508    1   1   7
                84.71          1.51        1.1438    1   4   6
                84.92          4.77        1.1415    4   1   1
                88.00          1.08        1.1093    2   3   6
                88.53          2.06        1.1040    0   6   5
                88.71          3.43        1.1022    3   2   5
                89.00          2.93        1.0994    0   8   0
                89.00          2.93        1.0994    0   8   0
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.