Topaz
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern R050176
      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:   4.649026   8.794280   8.389668   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        4.3971    0   2   0
                21.20          1.95        4.1948    0   0   2
                21.64          8.83        4.1101    1   1   0
                22.85          4.70        3.8946    0   2   1
                24.13         74.81        3.6909    1   1   1
                27.94         86.00        3.1946    1   2   0
                29.44         39.61        3.0352    0   2   2
                29.94         20.63        2.9855    1   2   1
                30.46        100.00        2.9358    1   1   2
                36.23         23.22        2.4796    1   3   0
                37.53          8.23        2.3964    1   0   3
                37.83         17.27        2.3780    1   3   1
                38.14         49.10        2.3597    0   2   3
                38.95          8.01        2.3121    1   1   3
                40.12          3.41        2.2473    2   1   0
                41.05          9.67        2.1986    0   4   0
                41.60         13.25        2.1708    2   1   1
                42.50          4.53        2.1268    0   4   1
                42.98         55.18        2.1042    1   2   3
                43.13          1.38        2.0974    0   0   4
                44.06         29.23        2.0550    2   2   0
                45.64          7.30        1.9875    1   4   0
                45.80          2.11        1.9810    2   1   2
                46.64          1.54        1.9473    0   4   2
                46.98          4.58        1.9340    1   4   1
                48.73         24.63        1.8682    1   1   4
                49.09         26.62        1.8553    1   3   3
                50.07         11.69        1.8214    2   3   0
                50.82          6.43        1.7961    1   4   2
                51.32          5.51        1.7799    2   3   1
                54.94         32.96        1.6707    2   3   2
                55.47          8.28        1.6560    2   2   3
                56.81         13.77        1.6201    1   4   3
                57.70          2.40        1.5973    2   4   0
                58.46          1.46        1.5783    1   0   5
                60.34         10.64        1.5334    2   1   4
                60.66         20.14        1.5262    2   3   3
                61.04          4.24        1.5176    0   4   4
                62.17          1.11        1.4927    2   4   2
                62.50          2.85        1.4855    1   2   5
                63.64         10.44        1.4616    3   2   0
                64.52          5.12        1.4438    0   6   1
                64.58          2.66        1.4427    1   4   4
                64.72          1.94        1.4399    3   2   1
                65.00          4.46        1.4342    3   1   2
                65.84         38.22        1.4179    1   5   3
                66.66         24.37        1.4026    2   5   0
                66.89         23.76        1.3983    0   0   6
                67.36          8.65        1.3897    1   3   5
                67.50          1.29        1.3870    2   4   3
                67.70          3.85        1.3834    2   5   1
                68.16          4.98        1.3752    2   3   4
                69.29         37.57        1.3555    3   0   3
                69.49          1.21        1.3521    3   3   1
                69.94          4.49        1.3445    2   1   5
                70.66          1.01        1.3325    0   2   6
                71.05          5.14        1.3262    1   6   2
                72.82          4.26        1.2982    0   6   3
                73.97          7.92        1.2809    1   2   6
                74.66          2.45        1.2708    2   4   4
                75.85          2.07        1.2537    2   5   3
                75.94          1.46        1.2525    3   4   1
                76.09          6.31        1.2504    1   6   3
                76.85          2.59        1.2398    2   6   0
                77.28          3.15        1.2340    3   1   4
                77.84          1.37        1.2265    2   6   1
                78.49          4.48        1.2180    1   3   6
                78.89          5.21        1.2128    1   7   0
                78.91          1.59        1.2126    3   4   2
                79.79          3.20        1.2014    0   6   4
                82.74          1.33        1.1659    2   5   4
                82.97          2.46        1.1632    1   6   4
                83.05          2.38        1.1623    4   0   0
                83.60          3.15        1.1560    2   2   6
                84.08          5.08        1.1506    1   1   7
                84.72          1.51        1.1436    1   4   6
                84.91          4.77        1.1415    4   1   1
                88.01          1.08        1.1091    2   3   6
                88.54          2.06        1.1039    0   6   5
                88.72          3.43        1.1021    3   2   5
                89.00          2.93        1.0993    0   8   0
                89.00          2.93        1.0993    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.