Institute of Experimental Mineralogy
                 Russian Academy of Sciences
     -------------------------------------------------
           142432, Chernogolovka, Moscow district
             A.V. Chichagov  +7(496)52-22320

                            ***

          ***      W W W - X R A Y P O L       ***
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BERYL

1, t-beryl, s-beryl

Be(3)Al(2)Si(6)O(18)


Hexagonal  P 6/mcc  Z = 2

P6/mcc

9 .6 .1988

Ref.Str.:

         Solov'eva L.N., Bakakin V.V. (1966)

         * Zh. Strukt. Chim. (in russian), 7, 469-471

                   Initial data from BDM-file 

   Lattice parameters (cub. angs.,degr.):

             a =   9.209    alpha =   90.0 
             b =   9.209    beta  =   90.0 
             c =   9.197    gamma =  120.0 

    Unit cell volume (cub. angs.) =   675.46

    Molar volume ( cub.cm/mol.) =   203.43

  Co-ordinates, thermal parameters, occupation for atomic positions:

NoP   x/a     y/b     z/c    B(j)   atom  / occupation

   1 0.3333  0.6667  0.25     0.0    Al    = 1.00
   2 0.5     0.0     0.25     0.0    Be    = 1.00
   3 0.3784  0.1156  0.0      0.0    Si    = 1.00
   4 0.3092  0.2357  0.0      0.0    O     = 1.00
   5 0.4981  0.1447  0.1445   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.3333     0.6667     0.25  
     2       2     0.5        0.0        0.25  
     3       3     0.3784     0.1156     0.0   
     4       4     0.3092     0.2357     0.0   
     5       5     0.4981     0.1447     0.1445
     6       2     0.0        0.5        0.25  
     7       2     0.5        0.5        0.25  
     8       3     0.8844     0.2628     0.0   
     9       3     0.7372     0.6216     0.0   
    10       4     0.7643     0.0735     0.0   
    11       4     0.9265     0.6908     0.0   
    12       5     0.8553     0.3534     0.1445
    13       5     0.6466     0.5019     0.1445
    14       1     0.6667     0.3333     0.25  
    15       3     0.6216     0.8844     0.0   
    16       4     0.6908     0.7643     0.0   
    17       5     0.5019     0.8553     0.1445
    18       3     0.1156     0.7372     0.0   
    19       3     0.2628     0.3784     0.0   
    20       4     0.2357     0.9265     0.0   
    21       4     0.0735     0.3092     0.0   
    22       5     0.1447     0.6466     0.1445
    23       5     0.3534     0.4981     0.1445
    24       1     0.3333     0.6667     0.75  
    25       2     0.5        0.5        0.75  
    26       3     0.3784     0.2628     0.5   
    27       4     0.3092     0.0735     0.5   
    28       5     0.4981     0.3534     0.6445
    29       2     0.0        0.5        0.75  
    30       2     0.5        0.0        0.75  
    31       3     0.8844     0.6216     0.5   
    32       3     0.7372     0.1156     0.5   
    33       4     0.7643     0.6908     0.5   
    34       4     0.9265     0.2357     0.5   
    35       5     0.8553     0.5019     0.6445
    36       5     0.6466     0.1447     0.6445
    37       1     0.6667     0.3333     0.75  
    38       3     0.6216     0.7372     0.5   
    39       4     0.6908     0.9265     0.5   
    40       5     0.5019     0.6466     0.6445
    41       3     0.1156     0.3784     0.5   
    42       3     0.2628     0.8844     0.5   
    43       4     0.2357     0.3092     0.5   
    44       4     0.0735     0.7643     0.5   
    45       5     0.1447     0.4981     0.6445
    46       5     0.3534     0.8553     0.6445
    47       5     0.4981     0.1447     0.8555
    48       5     0.8553     0.3534     0.8555
    49       5     0.6466     0.5019     0.8555
    50       5     0.5019     0.8553     0.8555
    51       5     0.1447     0.6466     0.8555
    52       5     0.3534     0.4981     0.8555
    53       5     0.4981     0.3534     0.3555
    54       5     0.8553     0.5019     0.3555
    55       5     0.6466     0.1447     0.3555
    56       5     0.5019     0.6466     0.3555
    57       5     0.1447     0.4981     0.3555
    58       5     0.3534     0.8553     0.3555


X-ray density (g/cm cub.)   =      2.64

MU (1/cm) =      79.561    Mass attenuation coefficient (cm**2/g) =     30.116

 Selected interatomic distances (cation-anion,anion-anion):

 NoP    Atom              Rad.sph.      C.N.    Distance     NoP N.
                           (angs.)               (angs.)

    1    Al                  2.316        6
                                                 1.9163       5
                                                 1.9163       5
                                                 1.9163       5
                                                 1.9163       5
                                                 1.9163       5
                                                 1.9162       5
    2    Be                  2.04         4
                                                 1.6555       5
                                                 1.6555       5
                                                 1.6556       5
                                                 1.6556       5
    3    Si                  2.1          4
                                                 1.5278       4
                                                 1.6606       5
                                                 1.5719       4
                                                 1.6606       5
    4    O                   3.264        8
                                                 2.6367       5
                                                 3.1326       5
                                                 2.5765       4
                                                 2.5766       4
                                                 2.6053       5
                                                 2.6367       5
                                                 3.1326       5
                                                 2.6053       5
    5    O                   3.264       10
                                                 2.6367       4
                                                 3.1326       4
                                                 2.8622       5
                                                 2.8622       5
                                                 2.6828       5
                                                 2.6052       4
                                                 2.6579       5
                                                 2.7312       5
                                                 2.374        5
                                                 3.0155       5

  X-ray diffraction powder data (II),  X-Ray W.L. =   1.54056(angs.):

  No   H   K   L   Theta 2*Theta    S       LPG   MF        F          I int.
                    ( degree )                                         *100

    1   1   0   0  5.543  11.085   0.063  211.42    6       76.9     1643.3
    2   1   1   0  9.63   19.26    0.109   68.54    6       31.7       90.4
    3   0   0   2  9.643  19.286   0.109   68.36    2      127.4      486.3
    4   2   0   0 11.138  22.275   0.125   50.7     6       47.8      152.1
    5   1   0   2 11.149  22.298   0.126   50.6    12       55.0      403.3
    6   1   1   2 13.694  27.388   0.154   32.84   12      114.2     1126.5
    7   2   1   0 14.805  29.611   0.166   27.81   12       23.4       40.0
    8   2   0   2 14.814  29.628   0.166   27.78   12       63.0      290.0
    9   2   1   1 15.6    31.199   0.175   24.86   24       89.6     1049.7
   10   3   0   0 16.843  33.686   0.188   21.06    6       20.2       11.3
   11   2   1   2 17.791  35.582   0.198   18.69   24       51.9      264.6
   12   2   2   0 19.547  39.094   0.217   15.19    6       19.4        7.5
   13   3   0   2 19.553  39.107   0.217   15.18   12        7.9        2.5
   14   0   0   4 19.573  39.147   0.217   15.14    2      114.4       86.9
   15   3   1   0 20.38   40.759   0.226   13.84   12       30.9       34.7
   16   1   0   4 20.405  40.811   0.226   13.8    12       25.7       24.0
   17   3   1   1 20.988  41.976   0.232   12.96   24       28.7       56.2
   18   2   1   3 21.0    42.001   0.233   12.95   24       18.6       23.6
   19   2   2   2 21.973  43.946   0.243   11.7    12        4.0        0.5
   20   1   1   4 21.991  43.982   0.243   11.67   12       37.9       44.2
   21   4   0   0 22.727  45.453   0.251   10.84    6       57.7       47.4
   22   3   1   2 22.733  45.465   0.251   10.83   24       30.1       51.6
   23   2   0   4 22.75   45.5     0.251   10.81   12       74.8      159.0
   24   3   2   0 24.898  49.796   0.273    8.81   12       50.6       59.4
   25   4   0   2 24.903  49.806   0.273    8.81   12        9.8        2.2
   26   2   1   4 24.92   49.839   0.274    8.79   24        0.4        0.0
   27   3   2   1 25.42   50.84    0.279    8.41   24        7.5        2.5
   28   3   1   3 25.431  50.862   0.279    8.4    24       61.5      167.3
   29   4   1   0 26.27   52.54    0.287    7.8    12       62.7       80.7
   30   3   0   4 26.291  52.582   0.288    7.78   12       84.9      147.4
   31   4   1   1 26.773  53.546   0.292    7.47   24       48.7       93.1
   32   3   2   2 26.943  53.886   0.294    7.36   24       21.0       17.0
   33   4   1   2 28.245  56.49    0.307    6.61   24       34.6       41.7
   34   2   2   4 28.26   56.52    0.307    6.61   12      107.0      198.8
   35   5   0   0 28.876  57.753   0.313    6.29    6       88.3       64.5
   36   3   1   4 28.896  57.792   0.314    6.28   24       28.6       27.0
   37   3   2   3 29.359  58.718   0.318    6.06   24       42.6       57.8
   38   2   1   5 29.378  58.757   0.318    6.05   24       29.1       26.9
   39   3   3   0 30.124  60.247   0.326    5.72    6       45.2       15.4
   40   0   0   6 30.167  60.334   0.326    5.7     2      164.5       67.6
   41   4   1   3 30.594  61.188   0.33     5.53   24       79.8      185.3
   42   4   2   0 30.735  61.471   0.332    5.47   12       25.2        9.2
   43   5   0   2 30.74   61.48    0.332    5.47   12        7.6        0.8
   44   4   0   4 30.755  61.509   0.332    5.46   12        8.2        1.0
   45   1   0   6 30.778  61.557   0.332    5.45   12        6.4        0.6
   46   4   2   1 31.191  62.382   0.336    5.3    24       11.4        3.6
   47   3   3   2 31.943  63.887   0.343    5.03   12       70.7       66.1
   48   1   1   6 31.981  63.961   0.344    5.01   12       72.7       69.8
   49   5   1   0 32.531  65.062   0.349    4.83   12        8.8        1.0
   50   4   2   2 32.536  65.071   0.349    4.83   24       51.0       66.0
   51   3   2   4 32.55   65.099   0.349    4.82   24       60.2       92.0
   52   2   0   6 32.573  65.145   0.349    4.82   12       27.5        9.6
   53   5   1   1 32.973  65.946   0.353    4.69   24       26.7       17.6
   54   3   1   5 33.0    66.001   0.354    4.68   24       22.6       12.5
   55   4   1   4 33.717  67.435   0.36     4.48   24        5.6        0.7
   56   5   1   2 34.28   68.561   0.366    4.32   24       51.7       60.9
   57   2   1   6 34.316  68.633   0.366    4.32   24       49.0       54.4
   58   4   2   3 34.715  69.431   0.37     4.21   24        7.0        1.1
   59   6   0   0 35.416  70.831   0.376    4.05    6       43.9       10.3
   60   3   0   6 35.456  70.911   0.377    4.04   12       22.3        5.3
   61   4   3   0 35.98   71.959   0.381    3.92   12        8.7        0.8
   62   5   0   4 35.997  71.995   0.382    3.92   12       24.0        5.9
   63   4   3   1 36.401  72.803   0.385    3.84   24       13.0        3.4
   64   5   1   3 36.41   72.82    0.385    3.83   24        2.8        0.2
   65   3   2   5 36.428  72.855   0.385    3.83   24       21.6        9.4
   66   5   2   0 37.097  74.194   0.392    3.7    12       84.6       69.7
   67   6   0   2 37.101  74.203   0.392    3.7    12      108.0      113.4
   68   3   3   4 37.114  74.229   0.392    3.7    12        3.0        0.1
   69   2   2   6 37.136  74.272   0.392    3.69   12       38.9       14.7
   70   5   2   1 37.514  75.028   0.395    3.63   24       76.2      110.8
   71   4   1   5 37.54   75.08    0.396    3.62   24       57.0       61.8
   72   4   3   2 37.655  75.311   0.397    3.6    24        2.2        0.1
   73   4   2   4 37.668  75.337   0.397    3.6    24       44.6       37.7
   74   3   1   6 37.69   75.38    0.397    3.6    24       41.2       32.1
   75   5   2   2 38.755  77.51    0.406    3.43   24       26.9       13.0
   76   6   1   0 39.297  78.595   0.411    3.35   12       50.0       22.0
   77   5   1   4 39.314  78.629   0.411    3.35   24       25.9       11.8
   78   4   0   6 39.336  78.671   0.411    3.34   12       28.2        7.0
   79   6   1   1 39.707  79.413   0.415    3.29   24        5.1        0.5
   80   4   3   3 39.715  79.43    0.415    3.29   24       83.1      119.5
   81   2   1   7 39.758  79.516   0.415    3.29   24       71.4       88.0
   82   5   2   3 40.799  81.598   0.424    3.16   24       35.1       20.5
   83   6   1   2 40.929  81.858   0.425    3.15   24        2.2        0.1
   84   3   2   6 40.963  81.925   0.426    3.14   24       10.9        2.0
   85   4   2   5 41.356  82.711   0.429    3.1    24        6.7        0.7
   86   4   4   0 42.002  84.004   0.434    3.04    6       27.1        2.9
   87   6   0   4 42.019  84.037   0.434    3.04   12       63.9       32.7
   88   4   1   6 42.04   84.079   0.435    3.03   24        7.8        1.0
   89   0   0   8 42.069  84.138   0.435    3.03    2      191.5       48.7
   90   5   3   0 42.539  85.077   0.439    2.99   12       25.2        5.0
   91   7   0   0 42.539  85.077   0.439    2.99    6       41.0        6.6
   92   4   3   4 42.556  85.111   0.439    2.99   24       46.5       34.0
   93   1   0   8 42.606  85.212   0.439    2.99   12       22.9        4.1
   94   5   3   1 42.942  85.884   0.442    2.96   24        1.4        0.0
   95   6   1   3 42.95   85.901   0.442    2.96   24        9.4        1.4
   96   5   1   5 42.967  85.934   0.442    2.96   24       11.1        1.9
   97   3   1   7 42.992  85.985   0.443    2.95   24       16.5        4.2
   98   4   4   2 43.614  87.229   0.448    2.91   12       62.3       29.7
   99   5   2   4 43.627  87.254   0.448    2.91   24       67.9       70.4
  100   1   1   8 43.677  87.355   0.448    2.91   12       15.8        1.9
  101   6   2   0 44.145  88.29    0.452    2.88   12        2.7        0.1
  102   5   3   2 44.149  88.299   0.452    2.88   24       19.4        5.7
  103   7   0   2 44.149  88.299   0.452    2.88   12       17.8        2.4
  104   5   0   6 44.183  88.366   0.452    2.87   12       25.9        5.1
  105   2   0   8 44.212  88.424   0.453    2.87   12       33.3        8.4
  106   6   2   1 44.547  89.094   0.455    2.85   24        8.8        1.2


  X-ray diffraction powder data (I)...X-Ray wave length =  1.54056 (angs.):

  No   H   K   L   Theta 2*Theta    d           I int   I int.n.  I p.h.n.   H(Si)
                    ( degree )   (angstrem)     *100                         *100

    1   1   0   0   5.543  11.085  7.97523     1643.3    100.0    100.0     5.6
    2   0   0   2   9.643  19.286  4.5985       576.7     35.1     34.9     5.6
    3   1   0   2  11.149  22.298  3.98372      555.4     33.8     33.6     5.6
    4   1   1   2  13.694  27.388  3.25375     1126.5     68.5     67.8     5.6
    5   2   0   2  14.814  29.628  3.01267      330.0     20.1     19.8     5.6
    6   2   1   1  15.6    31.199  2.86442     1049.7     63.9     63.0     5.6
    7   2   1   2  17.791  35.582  2.521        264.6     16.1     15.8     5.7
    8   0   0   4  19.573  39.147  2.29925       96.9      5.9      5.8     5.7
    9   3   1   0  20.38   40.759  2.21193       58.7      3.6      3.5     5.7
   10   3   1   1  20.988  41.976  2.15061       79.8      4.9      4.7     5.7
   11   1   1   4  21.991  43.982  2.05705       44.2      2.7      2.6     5.7
   12   2   0   4  22.75   45.5    1.99186      258.0     15.7     15.3     5.7
   13   3   2   0  24.898  49.796  1.82964       61.6      3.7      3.6     5.7
   14   3   1   3  25.431  50.862  1.79377      169.8     10.3     10.0     5.8
   15   3   0   4  26.291  52.582  1.73904      228.1     13.9     13.4     5.8
   16   4   1   1  26.773  53.546  1.70999       93.1      5.7      5.5     5.8
   17   3   2   2  26.943  53.886  1.70002       17.0      1.0      1.0     5.8
   18   2   2   4  28.26   56.52   1.62687      240.5     14.6     14.0     5.8
   19   5   0   0  28.876  57.753  1.59505       91.5      5.6      5.3     5.8
   20   3   2   3  29.359  58.718  1.57111       84.7      5.2      4.9     5.8
   21   0   0   6  30.167  60.334  1.53283       67.6      4.1      3.9     5.8
   22   4   1   3  30.594  61.188  1.51347      185.3     11.3     10.7     5.8
   23   3   3   2  31.943  63.887  1.45588       66.1      4.0      3.8     5.9
   24   1   1   6  31.981  63.961  1.45436       69.8      4.2      4.0     5.9
   25   3   2   4  32.55   65.099  1.43167      167.6     10.2      9.7     5.9
   26   5   1   1  32.973  65.946  1.41533       30.2      1.8      1.7     5.9
   27   5   1   2  34.28   68.561  1.36758       60.9      3.7      3.5     5.9
   28   2   1   6  34.316  68.633  1.36632       54.4      3.3      3.1     5.9
   29   6   0   2  37.101  74.203  1.27693      183.2     11.1     10.4     6.0
   30   5   2   1  37.514  75.028  1.26492      172.6     10.5      9.8     6.0
   31   4   2   4  37.668  75.337  1.2605        69.8      4.3      4.0     6.0
   32   6   1   0  39.297  78.595  1.21621       33.8      2.1      1.9     6.0
   33   4   3   3  39.715  79.43   1.2055       119.5      7.3      6.7     6.0
   34   2   1   7  39.758  79.516  1.20442       88.0      5.4      4.9     6.0
   35   5   2   3  40.799  81.598  1.17886       20.5      1.2      1.1     6.1
   36   6   0   4  42.019  84.037  1.15075       35.6      2.2      2.0     6.1
   37   0   0   8  42.069  84.138  1.14962       48.7      3.0      2.7     6.1
   38   4   3   4  42.556  85.111  1.13895       45.7      2.8      2.5     6.1
   39   5   2   4  43.627  87.254  1.11641      100.2      6.1      5.5     6.2

Reference:
Chichagov A.V. et al.
Information-Calculating System on Crystal Structure Data of Minerals
(MINCRYST)
- Kristallographiya, v.35, n.3, 1990, p.610-616 (in Russian)