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       ***
                  ***********************
ZIRCON

13, t-zircon, s-zircon

ZrSiO(4)


Tetragonal  * I4(1)/amd  Z = 4

*I4(1)/amd

1 .3 .1901

Ref.Str.:

         Rios, T. Malcherek, E.K.H. Salje, C. Domeneghetti (2000)

         * Acta Cryst., B56, 947-952

Reserv:

         N.A.D.

                   Initial data from BDM-file 

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

             a =   6.618    alpha =   90.0 
             b =   6.618    beta  =   90.0 
             c =   6.019    gamma =   90.0 

    Unit cell volume (cub. angs.) =   263.62

    Molar volume ( cub.cm/mol.) =    39.7 

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

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

   1 0.0     0.75    0.125    0.0    Zr    = 0.99, Hf    = 0.01
   2 0.0     0.75    0.625    0.0    Si    = 1.00
   3 0.0     0.0658  0.1955   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.0        0.75       0.125 
     2       2     0.0        0.75       0.625 
     3       3     0.0        0.0658     0.1955
     4       1     0.0        0.25       0.875 
     5       2     0.0        0.25       0.375 
     6       3     0.0        0.9342     0.8045
     7       1     0.5        0.75       0.375 
     8       2     0.5        0.75       0.875 
     9       3     0.5        0.0658     0.3045
    10       1     0.5        0.25       0.625 
    11       2     0.5        0.25       0.125 
    12       3     0.5        0.9342     0.6955
    13       3     0.0        0.5658     0.8045
    14       3     0.0        0.4342     0.1955
    15       3     0.5        0.5658     0.6955
    16       3     0.5        0.4342     0.3045
    17       3     0.6842     0.25       0.9455
    18       3     0.8158     0.75       0.4455
    19       3     0.8158     0.25       0.5545
    20       3     0.6842     0.75       0.0545
    21       3     0.1842     0.25       0.5545
    22       3     0.3158     0.75       0.0545
    23       3     0.3158     0.25       0.9455
    24       3     0.1842     0.75       0.4455


X-ray density (g/cm cub.)   =      4.64

MU (1/cm) =     393.772    Mass attenuation coefficient (cm**2/g) =     84.884

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

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

    1   Zr   ,Hf             2.616        8
                                                 2.1326       3
                                                 2.282        3
                                                 2.282        3
                                                 2.1326       3
                                                 2.282        3
                                                 2.1326       3
                                                 2.1326       3
                                                 2.282        3
    2    Si                  2.1          4
                                                 1.6289       3
                                                 1.6289       3
                                                 1.6289       3
                                                 1.6289       3
    3    O                   3.264       10
                                                 2.5094       3
                                                 2.4381       3
                                                 2.8493       3
                                                 2.8493       3
                                                 2.7643       3
                                                 3.0751       3
                                                 2.7643       3
                                                 3.0751       3
                                                 2.8493       3
                                                 2.8493       3

  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   1  9.962  19.923   0.112   63.92    8       64.4     3051.4
    2   2   0   0 13.461  26.922   0.151   34.06    4      195.3     7478.5
    3   2   1   1 16.859  33.719   0.188   21.02   16       32.9      522.7
    4   1   1   2 17.717  35.433   0.198   18.86    8      142.4     4401.4
    5   2   2   0 19.221  38.441   0.214   15.77    4      102.6      954.5
    6   2   0   2 20.241  40.483   0.225   14.06    8       54.7      484.0
    7   3   0   1 21.832  43.664   0.241   11.87    8      106.2     1541.2
    8   1   0   3 23.652  47.304   0.26     9.9     8       95.7     1043.5
    9   3   2   1 26.023  52.046   0.285    7.97   16       76.8     1081.4
   10   3   1   2 26.635  53.27    0.291    7.56   16      155.8     4220.7
   11   2   1   3 27.634  55.268   0.301    6.95   16       40.1      257.5
   12   4   0   0 27.747  55.494   0.302    6.89    4      171.9     1170.9
   13   4   1   1 29.78   59.559   0.322    5.87   16       38.2      197.0
   14   0   0   4 30.79   61.581   0.332    5.45    2      123.9      240.5
   15   3   0   3 31.263  62.525   0.337    5.27    8       60.4      221.5
   16   4   2   0 31.367  62.734   0.338    5.23    8      112.4      760.6
   17   4   0   2 32.092  64.184   0.345    4.97    8       24.1       33.3
   18   3   3   2 33.793  67.587   0.361    4.46    8      163.3     1367.5
   19   2   0   4 34.218  68.436   0.365    4.34    8      128.1      819.4
   20   3   2   3 34.665  69.33    0.369    4.23   16       18.7       34.2
   21   4   2   2 35.454  70.907   0.377    4.04   16       12.0       13.5
   22   4   3   1 36.574  73.148   0.387    3.8    16       68.1      405.8
   23   5   0   1 36.574  73.148   0.387    3.8     8       33.7       49.6
   24   2   2   4 37.49   74.979   0.395    3.63    8      131.4      721.5
   25   4   1   3 37.921  75.841   0.399    3.56   16       48.8      194.8
   26   3   1   4 39.086  78.172   0.409    3.38   16       31.5       77.1
   27   5   2   1 39.771  79.542   0.415    3.28   16       19.7       29.3
   28   5   1   2 40.265  80.53    0.42     3.22   16      101.9      771.0
   29   1   0   5 40.57   81.14    0.422    3.19    8       19.9       14.6
   30   4   4   0 41.179  82.358   0.427    3.12    4      115.8      240.6
   31   2   1   5 43.692  87.383   0.448    2.9    16       55.9      208.9
   32   4   0   4 43.785  87.569   0.449    2.9     8      112.3      420.8
   33   4   3   3 44.202  88.404   0.453    2.87   16       30.5       61.6
   34   5   0   3 44.202  88.404   0.453    2.87    8       70.4      163.9
   35   6   0   0 44.295  88.59    0.453    2.87    4      153.7      389.8


  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   1   9.962  19.923  4.45282     3051.4     40.8     41.0     5.6
    2   2   0   0  13.461  26.922  3.309       7478.5    100.0    100.0     5.6
    3   2   1   1  16.859  33.719  2.65594      522.7      7.0      7.0     5.7
    4   1   1   2  17.717  35.433  2.53124     4401.4     58.9     58.4     5.7
    5   2   2   0  19.221  38.441  2.33982      954.5     12.8     12.6     5.7
    6   2   0   2  20.241  40.483  2.22641      484.0      6.5      6.4     5.7
    7   3   0   1  21.832  43.664  2.07127     1541.2     20.6     20.3     5.7
    8   1   0   3  23.652  47.304  1.92004     1043.5     14.0     13.7     5.7
    9   3   2   1  26.023  52.046  1.75568     1081.4     14.5     14.1     5.8
   10   3   1   2  26.635  53.27   1.71819     4220.7     56.4     55.0     5.8
   11   2   1   3  27.634  55.268  1.66072      257.5      3.4      3.3     5.8
   12   4   0   0  27.747  55.494  1.6545      1170.9     15.7     15.2     5.8
   13   4   1   1  29.78   59.559  1.5509       197.0      2.6      2.5     5.8
   14   0   0   4  30.79   61.581  1.50475      240.5      3.2      3.1     5.8
   15   3   0   3  31.263  62.525  1.48427      221.5      3.0      2.8     5.8
   16   4   2   0  31.367  62.734  1.47983      760.6     10.2      9.8     5.9
   17   3   3   2  33.793  67.587  1.3849      1367.5     18.3     17.4     5.9
   18   2   0   4  34.218  68.436  1.36977      819.4     11.0     10.4     5.9
   19   4   3   1  36.574  73.148  1.29271      455.4      6.1      5.7     6.0
   20   2   2   4  37.49   74.979  1.26562      721.5      9.6      9.1     6.0
   21   4   1   3  37.921  75.841  1.25336      194.8      2.6      2.4     6.0
   22   3   1   4  39.086  78.172  1.22173       77.1      1.0      1.0     6.0
   23   5   1   2  40.265  80.53   1.19179      771.0     10.3      9.6     6.1
   24   4   4   0  41.179  82.358  1.16991      240.6      3.2      3.0     6.1
   25   2   1   5  43.692  87.383  1.11509      208.9      2.8      2.6     6.2
   26   4   0   4  43.785  87.569  1.1132       420.8      5.6      5.1     6.2
   27   5   0   3  44.202  88.404  1.10484      225.5      3.0      2.7     6.2
   28   6   0   0  44.295  88.59   1.103        389.8      5.2      4.7     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)