Beryl
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern of R060583
      Brown G E, Mills B A
      American Mineralogist 71 (1986) 547-556
      High-temperature structure and crystal chemistry of hydrous alkali-rich beryl
      from the Harding pegmatite, Taos County, New Mexico
      Sample: T = 24 deg C, before heating
      O2x has been corrected

      CELL PARAMETERS:   9.236000   9.236000   9.246000   90.00000   90.00000   120.0000
      SPACE GROUP: P6/mcc
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                11.14         60.52        7.9813    1   0   0
                19.17         28.16        4.6407    0   0   2
                22.20         13.15        4.0118    1   0   2
                22.32          1.77        3.9907    2   0   0
                27.32        100.00        3.2698    1   1   2
                29.56         27.39        3.0258    2   0   2
                29.65         13.61        3.0167    2   1   0
                31.21         85.39        2.8689    2   1   1
                33.72          3.16        2.6604    3   0   0
                35.53         12.15        2.5292    2   1   2
                38.84          8.85        2.3203    0   0   4
                39.13          1.13        2.3040    2   2   0
                40.52          4.79        2.2281    1   0   4
                40.79          5.33        2.2136    3   1   0
                41.99          6.85        2.1532    3   1   1
                43.90          1.63        2.0637    2   2   2
                45.23          4.79        2.0059    2   0   4
                45.48          1.19        1.9953    4   0   0
                49.58          1.28        1.8392    2   1   4
                49.82          1.41        1.8310    3   2   0
                50.73          8.67        1.8003    3   1   3
                52.33         14.08        1.7487    3   0   4
                52.56         11.67        1.7417    4   1   0
                53.55          9.01        1.7118    4   1   1
                53.84          2.21        1.7033    3   2   2
                56.28         15.32        1.6349    2   2   4
                56.44          2.49        1.6306    4   1   2
                57.77          2.64        1.5963    5   0   0
                58.38          2.48        1.5809    2   1   5
                58.59          5.16        1.5757    3   2   3
                59.79          3.95        1.5469    0   0   6
                61.06         13.97        1.5177    4   1   3
                61.48          2.23        1.5083    4   2   0
                63.44          5.39        1.4665    1   1   6
                63.84          5.05        1.4582    3   3   2
                64.87          3.21        1.4374    3   2   4
                65.02          3.80        1.4345    4   2   2
                67.21          1.69        1.3929    4   1   4
                68.12          2.85        1.3765    2   1   6
                68.51          2.06        1.3696    5   1   2
                70.83          1.05        1.3302    6   0   0
                73.77          1.91        1.2843    2   2   6
                74.15          8.78        1.2787    6   0   2
                74.19          4.15        1.2780    5   2   0
                74.73          4.82        1.2701    4   1   5
                75.01          6.67        1.2661    5   2   1
                75.11          4.55        1.2646    4   2   4
                78.40          1.19        1.2195    5   1   4
                78.84          6.00        1.2138    2   1   7
                79.30          6.70        1.2080    4   3   3
                81.47          1.40        1.1812    5   2   3
                83.27          3.30        1.1602    0   0   8
                83.81          1.44        1.1540    6   0   4
                84.88          1.29        1.1422    4   3   4
                87.02          3.71        1.1195    5   2   4
                87.02          3.71        1.1195    5   2   4
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.