Topaz
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050199
      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:   4.650015   8.797721   8.390882   90.00000   90.00000   90.00000
      SPACE GROUP: Pbnm
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                20.21          3.97        4.3989    0   2   0
                21.20          1.95        4.1954    0   0   2
                21.64          8.83        4.1111    1   1   0
                22.84          4.70        3.8960    0   2   1
                24.12         74.81        3.6918    1   1   1
                27.93         86.00        3.1956    1   2   0
                29.43         39.61        3.0360    0   2   2
                29.93         20.63        2.9863    1   2   1
                30.45        100.00        2.9363    1   1   2
                36.22         23.22        2.4805    1   3   0
                37.53          8.23        2.3968    1   0   3
                37.83         17.27        2.3787    1   3   1
                38.13         49.10        2.3603    0   2   3
                38.95          8.01        2.3125    1   1   3
                40.12          3.41        2.2478    2   1   0
                41.04          9.67        2.1994    0   4   0
                41.60         13.25        2.1713    2   1   1
                42.49          4.53        2.1276    0   4   1
                42.97         55.18        2.1047    1   2   3
                43.12          1.38        2.0977    0   0   4
                44.05         29.23        2.0555    2   2   0
                45.63          7.30        1.9882    1   4   0
                45.79          2.11        1.9814    2   1   2
                46.62          1.54        1.9480    0   4   2
                46.96          4.58        1.9347    1   4   1
                48.73         24.63        1.8685    1   1   4
                49.08         26.62        1.8558    1   3   3
                50.06         11.69        1.8219    2   3   0
                50.81          6.43        1.7967    1   4   2
                51.31          5.51        1.7804    2   3   1
                54.93         32.96        1.6711    2   3   2
                55.46          8.28        1.6563    2   2   3
                56.80         13.77        1.6205    1   4   3
                57.68          2.40        1.5978    2   4   0
                58.45          1.46        1.5785    1   0   5
                60.34         10.64        1.5336    2   1   4
                60.64         20.14        1.5266    2   3   3
                61.02          4.24        1.5180    0   4   4
                62.15          1.11        1.4932    2   4   2
                62.49          2.85        1.4858    1   2   5
                63.63         10.44        1.4619    3   2   0
                64.49          5.12        1.4444    0   6   1
                64.56          2.66        1.4430    1   4   4
                64.70          1.94        1.4402    3   2   1
                64.99          4.46        1.4345    3   1   2
                65.82         38.22        1.4184    1   5   3
                66.64         24.37        1.4030    2   5   0
                66.88         23.76        1.3985    0   0   6
                67.35          8.65        1.3900    1   3   5
                67.49          1.29        1.3874    2   4   3
                67.68          3.85        1.3838    2   5   1
                68.15          4.98        1.3755    2   3   4
                69.28         37.57        1.3557    3   0   3
                69.48          1.21        1.3524    3   3   1
                69.93          4.49        1.3447    2   1   5
                70.65          1.01        1.3327    0   2   6
                71.03          5.14        1.3267    1   6   2
                72.80          4.26        1.2987    0   6   3
                73.95          7.92        1.2812    1   2   6
                74.64          2.45        1.2711    2   4   4
                75.83          2.07        1.2541    2   5   3
                75.92          1.46        1.2528    3   4   1
                76.06          6.31        1.2508    1   6   3
                76.83          2.59        1.2402    2   6   0
                77.27          3.15        1.2343    3   1   4
                77.82          1.37        1.2269    2   6   1
                78.48          4.48        1.2182    1   3   6
                78.86          5.21        1.2133    1   7   0
                78.89          1.59        1.2129    3   4   2
                79.76          3.20        1.2018    0   6   4
                82.71          1.33        1.1662    2   5   4
                82.94          2.46        1.1636    1   6   4
                83.04          2.38        1.1625    4   0   0
                83.58          3.15        1.1563    2   2   6
                84.07          5.08        1.1508    1   1   7
                84.70          1.51        1.1439    1   4   6
                84.89          4.77        1.1418    4   1   1
                87.99          1.08        1.1093    2   3   6
                88.51          2.06        1.1042    0   6   5
                88.70          3.43        1.1023    3   2   5
                88.96          2.93        1.0997    0   8   0
                88.96          2.93        1.0997    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.