Topaz
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050405
      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:   4.652000   8.801000   8.404000   90.00000   90.00000   90.00000
      SPACE GROUP: Pbnm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                20.18          3.97        4.3985    0   2   0
                21.17          1.95        4.1955    0   0   2
                21.61          8.83        4.1109    1   1   0
                22.82          4.70        3.8957    0   2   1
                24.10         74.81        3.6917    1   1   1
                27.91         86.00        3.1954    1   2   0
                29.41         39.61        3.0359    0   2   2
                29.91         20.63        2.9862    1   2   1
                30.43        100.00        2.9363    1   1   2
                36.20         23.22        2.4803    1   3   0
                37.51          8.23        2.3968    1   0   3
                37.80         17.27        2.3786    1   3   1
                38.11         49.10        2.3602    0   2   3
                38.93          8.01        2.3125    1   1   3
                40.09          3.41        2.2477    2   1   0
                41.02          9.67        2.1993    0   4   0
                41.57         13.25        2.1712    2   1   1
                42.47          4.53        2.1274    0   4   1
                42.95         55.18        2.1046    1   2   3
                43.10          1.38        2.0978    0   0   4
                44.03         29.23        2.0554    2   2   0
                45.60          7.30        1.9881    1   4   0
                45.77          2.11        1.9813    2   1   2
                46.60          1.54        1.9479    0   4   2
                46.94          4.58        1.9345    1   4   1
                48.70         24.63        1.8685    1   1   4
                49.06         26.62        1.8558    1   3   3
                50.04         11.69        1.8218    2   3   0
                50.79          6.43        1.7966    1   4   2
                51.29          5.51        1.7803    2   3   1
                54.91         32.96        1.6710    2   3   2
                55.44          8.28        1.6563    2   2   3
                56.78         13.77        1.6204    1   4   3
                57.66          2.40        1.5977    2   4   0
                58.43          1.46        1.5785    1   0   5
                60.31         10.64        1.5336    2   1   4
                60.62         20.14        1.5265    2   3   3
                61.00          4.24        1.5180    0   4   4
                62.13          1.11        1.4931    2   4   2
                62.47          2.85        1.4858    1   2   5
                63.61         10.44        1.4618    3   2   0
                64.47          5.12        1.4443    0   6   1
                64.54          2.66        1.4430    1   4   4
                64.68          1.94        1.4401    3   2   1
                64.97          4.46        1.4344    3   1   2
                65.80         38.22        1.4183    1   5   3
                66.62         24.37        1.4030    2   5   0
                66.85         23.76        1.3985    0   0   6
                67.32          8.65        1.3899    1   3   5
                67.47          1.29        1.3873    2   4   3
                67.66          3.85        1.3837    2   5   1
                68.12          4.98        1.3755    2   3   4
                69.26         37.57        1.3557    3   0   3
                69.45          1.21        1.3524    3   3   1
                69.91          4.49        1.3447    2   1   5
                70.63          1.01        1.3328    0   2   6
                71.01          5.14        1.3266    1   6   2
                72.78          4.26        1.2986    0   6   3
                73.93          7.92        1.2812    1   2   6
                74.62          2.45        1.2710    2   4   4
                75.81          2.07        1.2540    2   5   3
                75.90          1.46        1.2527    3   4   1
                76.04          6.31        1.2507    1   6   3
                76.81          2.59        1.2402    2   6   0
                77.24          3.15        1.2343    3   1   4
                77.80          1.37        1.2268    2   6   1
                78.45          4.48        1.2182    1   3   6
                78.84          5.21        1.2132    1   7   0
                78.87          1.59        1.2128    3   4   2
                79.74          3.20        1.2017    0   6   4
                82.69          1.33        1.1662    2   5   4
                82.92          2.46        1.1635    1   6   4
                83.01          2.38        1.1625    4   0   0
                83.56          3.15        1.1562    2   2   6
                84.05          5.08        1.1508    1   1   7
                84.67          1.51        1.1438    1   4   6
                84.87          4.77        1.1417    4   1   1
                87.97          1.08        1.1093    2   3   6
                88.49          2.06        1.1041    0   6   5
                88.67          3.43        1.1023    3   2   5
                88.95          2.93        1.0996    0   8   0
                88.95          2.93        1.0996    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.