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       ***
                  ***********************
LIZARDITE

12, 2H1, at 300'C, f-serpentine

Mg(3)Si(2)O(5)(OH)(4)


Hexagonal  P 6(3)cm  Z = 2

R =0.045

21 .9 .1901

Ref.Str.:

         S. Guggenheim, W. Zhan (1998)

         * Canad. Mineral., 36, 1587-1594

Reserv:

         [Mg(2.83)Fe''(0.05)Al(0.1)][Si(1.93)Al(0.07)O(5)(OH)(4)

         There are U(ij) in the article. D.T.N.

                   Initial data from BDM-file 

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

             a =   5.336    alpha =   90.0 
             b =   5.336    beta  =   90.0 
             c =  14.614    gamma =  120.0 

    Unit cell volume (cub. angs.) =   360.36

    Molar volume ( cub.cm/mol.) =   108.53

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

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

   1 0.3333  0.6667  0.0292   0.0    Si    = 1.00
   2 0.332   0.0     0.2188   0.0    Mg    = 1.00
   3 0.3333  0.6667  0.1406   0.0    O     = 1.00
   4 0.494   0.0     0.991    0.0    O     = 1.00
   5 0.667   0.0     0.2859   0.0    O     = 1.00
   6 0.0     0.0     0.144    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     0.0292
     2       2     0.332      0.0        0.2188
     3       3     0.3333     0.6667     0.1406
     4       4     0.494      0.0        0.991 
     5       5     0.667      0.0        0.2859
     6       6     0.0        0.0        0.144 
     7       2     0.0        0.332      0.2188
     8       2     0.668      0.668      0.2188
     9       4     0.0        0.494      0.991 
    10       4     0.506      0.506      0.991 
    11       5     0.0        0.667      0.2859
    12       5     0.333      0.333      0.2859
    13       1     0.6667     0.3333     0.5292
    14       2     0.668      0.0        0.7188
    15       3     0.6667     0.3333     0.6406
    16       4     0.506      0.0        0.491 
    17       5     0.333      0.0        0.7859
    18       6     0.0        0.0        0.644 
    19       2     0.0        0.668      0.7188
    20       2     0.332      0.332      0.7188
    21       4     0.0        0.506      0.491 
    22       4     0.494      0.494      0.491 
    23       5     0.0        0.333      0.7859
    24       5     0.667      0.667      0.7859
    25       1     0.3333     0.6666     0.5292
    26       3     0.3333     0.6666     0.6406
    27       1     0.6667     0.3334     0.0292
    28       3     0.6667     0.3334     0.1406


X-ray density (g/cm cub.)   =      2.52

MU (1/cm) =     111.869    Mass attenuation coefficient (cm**2/g) =     44.465

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

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

    1    Si                  2.1          4
                                                 1.628        3
                                                 1.6386       4
                                                 1.6386       4
                                                 1.6391       4
    2    Mg                  2.52         6
                                                 2.1169       3
                                                 2.0389       5
                                                 2.0817       6
                                                 2.0272       5
                                                 2.0272       5
                                                 2.1174       3
    3    O                   3.264       12
                                                 2.6745       4
                                                 2.7705       5
                                                 3.0813       6
                                                 3.0808       6
                                                 3.0813       6
                                                 2.6745       4
                                                 2.6748       4
                                                 2.7703       5
                                                 2.7707       5
                                                 3.0809       3
                                                 3.0809       3
                                                 3.0804       3
    4    O                   3.264        7
                                                 2.6745       3
                                                 2.6686       4
                                                 2.6686       4
                                                 2.6686       4
                                                 2.6686       4
                                                 3.118        5
                                                 2.6748       3
    5    O                   3.264       10
                                                 2.7705       3
                                                 2.7309       6
                                                 3.0822       5
                                                 3.0777       5
                                                 3.0823       5
                                                 3.0777       5
                                                 3.0822       5
                                                 3.0823       5
                                                 3.118        4
                                                 2.7707       3
    6    O                   3.264        9
                                                 3.0813       3
                                                 3.0808       3
                                                 3.0813       3
                                                 2.7309       5
                                                 2.7309       5
                                                 2.7309       5
                                                 3.0813       3
                                                 3.0813       3
                                                 3.0808       3

  X-ray diffraction powder data (II),  X-Ray W.L. =   1.78892(angs.):

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

    1   0   0   2  7.031  14.063   0.068  130.51    2       66.5      890.0
    2   1   0   0 11.161  22.321   0.108   50.49    6       37.7      331.1
    3   1   0   2 13.239  26.479   0.128   35.28   12       36.2      427.6
    4   0   0   4 14.171  28.343   0.137   30.54    2      101.8      487.6
    5   1   0   4 18.186  36.371   0.174   17.81   12       28.9      137.5
    6   1   1   0 19.588  39.176   0.187   15.12    6       18.8       24.7
    7   1   1   1 19.925  39.851   0.191   14.56   12       23.5       74.4
    8   1   1   2 20.91   41.82    0.2     13.07   12       73.2      647.6
    9   0   0   6 21.545  43.09    0.205   12.22    2       42.8       34.4
   10   1   1   3 22.473  44.946   0.214   11.12   12       43.4      193.4
   11   2   0   0 22.775  45.551   0.216   10.79    6       12.7        8.0
   12   2   0   2 23.955  47.909   0.227    9.62   12       17.2       26.2
   13   1   0   6 24.527  49.054   0.232    9.12   12       20.7       36.1
   14   1   1   4 24.528  49.055   0.232    9.12   12       42.7      153.8
   15   1   1   5 26.996  53.992   0.254    7.33   12       59.7      241.0
   16   2   0   4 27.261  54.521   0.256    7.17   12       23.5       36.6
   17   0   0   8 29.317  58.635   0.274    6.08    2       44.7       18.7
   18   1   1   6 29.818  59.636   0.278    5.85   12       34.5       64.5
   19   2   1   0 30.804  61.609   0.286    5.44   12       25.4       32.5
   20   2   1   1 31.048  62.096   0.288    5.35   24        1.3        0.2
   21   1   0   8 31.77   63.541   0.294    5.09   12       15.9       11.9
   22   2   1   2 31.772  63.544   0.294    5.08   24       24.5       56.3
   23   2   0   6 32.249  64.497   0.298    4.92   12       28.1       36.0
   24   1   1   7 32.958  65.915   0.304    4.7    12       58.1      146.7
   25   2   1   3 32.959  65.917   0.304    4.7    24        1.6        0.2
   26   2   1   4 34.585  69.169   0.317    4.25   24       21.5       36.3
   27   3   0   0 35.498  70.997   0.325    4.03    6      112.6      235.9
   28   1   1   8 36.4    72.8     0.332    3.84   12       63.0      140.6
   29   3   0   2 36.402  72.803   0.332    3.84   12       57.8      118.6
   30   2   1   5 36.626  73.251   0.333    3.79   24        0.8        0.0
   31   0   0  10 37.738  75.477   0.342    3.59    2       55.0       16.7
   32   2   0   8 38.623  77.246   0.349    3.45   12       28.5       25.9
   33   2   1   6 39.063  78.126   0.352    3.38   24       16.7       17.5
   34   3   0   4 39.063  78.127   0.352    3.38   12       38.9       47.3
   35   1   0  10 39.936  79.872   0.359    3.26   12       12.4        4.6
   36   1   1   9 40.155  80.309   0.36     3.24   12       50.7       76.9
   37   2   1   7 41.889  83.779   0.373    3.05   24        1.5        0.1
   38   2   2   0 42.106  84.213   0.375    3.03    6       39.3       21.6
   39   2   2   1 42.322  84.644   0.376    3.01   12       19.6       10.7
   40   2   2   2 42.968  85.936   0.381    2.96   12       72.8      145.0
   41   3   0   6 43.398  86.795   0.384    2.92   12       30.0       24.3
   42   2   2   3 44.043  88.086   0.389    2.88   12       32.0       27.3
   43   1   1  10 44.256  88.511   0.39     2.87   12       51.8       71.0
   44   3   1   0 44.258  88.516   0.39     2.87   12       20.3       10.9
   45   3   1   1 44.473  88.945   0.392    2.86   24        1.8        0.2


  X-ray diffraction powder data (I)...X-Ray wave length =  1.78892 (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   0   0   2   7.031  14.063  7.307        890.0    100.0    100.0     5.6
    2   1   0   0  11.161  22.321  4.62111      331.1     37.2     37.0     5.6
    3   1   0   2  13.239  26.479  3.90561      427.6     48.0     47.6     5.6
    4   0   0   4  14.171  28.343  3.6535       487.6     54.8     54.2     5.6
    5   1   0   4  18.186  36.371  2.86598      137.5     15.4     15.2     5.7
    6   1   1   0  19.588  39.176  2.668         24.7      2.8      2.7     5.7
    7   1   1   1  19.925  39.851  2.62462       74.4      8.4      8.2     5.7
    8   1   1   2  20.91   41.82   2.50616      647.6     72.8     71.2     5.7
    9   0   0   6  21.545  43.09   2.43567       34.4      3.9      3.8     5.7
   10   1   1   3  22.473  44.946  2.34002      193.4     21.7     21.2     5.7
   11   2   0   2  23.955  47.909  2.20304       26.2      2.9      2.9     5.7
   12   1   1   4  24.528  49.055  2.15464      189.9     21.3     20.7     5.7
   13   1   1   5  26.996  53.992  1.9705       241.0     27.1     26.1     5.8
   14   2   0   4  27.261  54.521  1.95281       36.6      4.1      4.0     5.8
   15   0   0   8  29.317  58.635  1.82675       18.7      2.1      2.0     5.8
   16   1   1   6  29.818  59.636  1.79882       64.5      7.2      6.9     5.8
   17   2   1   0  30.804  61.609  1.74662       32.5      3.6      3.5     5.8
   18   2   1   2  31.772  63.544  1.69876       68.2      7.7      7.3     5.9
   19   2   0   6  32.249  64.497  1.67629       36.0      4.0      3.8     5.9
   20   1   1   7  32.958  65.915  1.64417      146.9     16.5     15.6     5.9
   21   2   1   4  34.585  69.169  1.5758        36.3      4.1      3.8     5.9
   22   3   0   0  35.498  70.997  1.54037      235.9     26.5     24.9     5.9
   23   1   1   8  36.4    72.8    1.50729      259.2     29.1     27.3     6.0
   24   0   0  10  37.738  75.477  1.4614        16.7      1.9      1.7     6.0
   25   2   0   8  38.623  77.246  1.43299       25.9      2.9      2.7     6.0
   26   3   0   4  39.063  78.127  1.41937       64.8      7.3      6.7     6.0
   27   1   1   9  40.155  80.309  1.38708       76.9      8.6      8.0     6.0
   28   2   2   0  42.106  84.213  1.334         21.6      2.4      2.2     6.1
   29   2   2   1  42.322  84.644  1.32848       10.7      1.2      1.1     6.1
   30   2   2   2  42.968  85.936  1.31231      145.0     16.3     14.8     6.1
   31   3   0   6  43.398  86.795  1.30187       24.3      2.7      2.5     6.1
   32   2   2   3  44.043  88.086  1.28663       27.3      3.1      2.8     6.2
   33   1   1  10  44.256  88.511  1.28172       82.0      9.2      8.3     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)