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       ***
                  ***********************
POLLUCITE

7, analogue

CsFeSi(2)O(6)


Cubic  I a3d  Z = 16

Ia3d

6 .2 .1906

Ref.Str.:

         Harris L.A., Clark G.W., Yakel H.L. (1963)

         * Amer. Mineral., 48, 100-109

Reserv:

         N.A.D.

                   Initial data from BDM-file 

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

             a =  13.66     alpha =   90.0 
             b =  13.66     beta  =   90.0 
             c =  13.66     gamma =   90.0 

    Unit cell volume (cub. angs.) =  2548.9 

    Molar volume ( cub.cm/mol.) =    95.96

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

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

   1 0.661   0.589   0.125    0.0    Si    = 0.67, Fe    = 0.33
   2 0.125   0.125   0.125    0.0    Cs    = 1.00
   3 0.111   0.131   0.722    0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.661      0.589      0.125 
     2       2     0.125      0.125      0.125 
     3       3     0.111      0.131      0.722 
     4       1     0.339      0.411      0.875 
     5       2     0.875      0.875      0.875 
     6       3     0.889      0.869      0.278 
     7       1     0.161      0.911      0.875 
     8       1     0.839      0.411      0.625 
     9       1     0.339      0.089      0.375 
    10       2     0.625      0.375      0.875 
    11       2     0.375      0.875      0.625 
    12       2     0.875      0.625      0.375 
    13       3     0.619      0.361      0.472 
    14       3     0.389      0.869      0.222 
    15       3     0.881      0.639      0.972 
    16       1     0.339      0.589      0.625 
    17       1     0.161      0.589      0.375 
    18       1     0.161      0.411      0.125 
    19       2     0.875      0.125      0.625 
    20       2     0.625      0.125      0.375 
    21       2     0.625      0.875      0.125 
    22       3     0.881      0.139      0.028 
    23       3     0.611      0.131      0.778 
    24       3     0.619      0.861      0.528 
    25       3     0.889      0.131      0.222 
    26       1     0.661      0.411      0.375 
    27       2     0.125      0.875      0.375 
    28       3     0.111      0.869      0.778 
    29       1     0.839      0.911      0.375 
    30       1     0.661      0.089      0.875 
    31       2     0.375      0.375      0.375 
    32       2     0.125      0.625      0.875 
    33       3     0.381      0.361      0.972 
    34       3     0.611      0.869      0.722 
    35       3     0.119      0.639      0.472 
    36       1     0.839      0.589      0.875 
    37       2     0.375      0.125      0.875 
    38       3     0.119      0.139      0.528 
    39       3     0.389      0.131      0.278 
    40       3     0.381      0.861      0.028 
    41       3     0.389      0.369      0.778 
    42       1     0.161      0.089      0.625 
    43       2     0.625      0.625      0.625 
    44       3     0.611      0.631      0.222 
    45       3     0.111      0.631      0.278 
    46       1     0.339      0.911      0.125 
    47       2     0.875      0.375      0.125 
    48       3     0.889      0.369      0.722 
    49       3     0.611      0.369      0.278 
    50       1     0.839      0.089      0.125 
    51       2     0.375      0.625      0.125 
    52       3     0.389      0.631      0.722 
    53       3     0.889      0.631      0.778 
    54       1     0.661      0.911      0.625 
    55       2     0.125      0.375      0.625 
    56       3     0.111      0.369      0.222 
    57       1     0.589      0.125      0.661 
    58       1     0.125      0.661      0.589 
    59       3     0.131      0.722      0.111 
    60       3     0.722      0.111      0.131 
    61       1     0.411      0.875      0.339 
    62       1     0.875      0.339      0.411 
    63       3     0.869      0.278      0.889 
    64       3     0.278      0.889      0.869 
    65       1     0.911      0.875      0.161 
    66       1     0.875      0.161      0.911 
    67       1     0.411      0.625      0.839 
    68       1     0.625      0.839      0.411 
    69       1     0.089      0.375      0.339 
    70       1     0.375      0.339      0.089 
    71       3     0.361      0.472      0.619 
    72       3     0.472      0.619      0.361 
    73       3     0.869      0.222      0.389 
    74       3     0.222      0.389      0.869 
    75       3     0.639      0.972      0.881 
    76       3     0.972      0.881      0.639 
    77       1     0.589      0.625      0.339 
    78       1     0.625      0.339      0.589 
    79       1     0.589      0.375      0.161 
    80       1     0.375      0.161      0.589 
    81       1     0.411      0.125      0.161 
    82       1     0.125      0.161      0.411 
    83       3     0.139      0.028      0.881 
    84       3     0.028      0.881      0.139 
    85       3     0.131      0.778      0.611 
    86       3     0.778      0.611      0.131 
    87       3     0.861      0.528      0.619 
    88       3     0.528      0.619      0.861 
    89       3     0.131      0.222      0.889 
    90       3     0.222      0.889      0.131 
    91       1     0.411      0.375      0.661 
    92       1     0.375      0.661      0.411 
    93       3     0.869      0.778      0.111 
    94       3     0.778      0.111      0.869 
    95       1     0.911      0.375      0.839 
    96       1     0.375      0.839      0.911 
    97       1     0.089      0.875      0.661 
    98       1     0.875      0.661      0.089 
    99       3     0.361      0.972      0.381 
   100       3     0.972      0.381      0.361 
   101       3     0.869      0.722      0.611 
   102       3     0.722      0.611      0.869 
   103       3     0.639      0.472      0.119 
   104       3     0.472      0.119      0.639 
   105       1     0.589      0.875      0.839 
   106       1     0.875      0.839      0.589 
   107       3     0.139      0.528      0.119 
   108       3     0.528      0.119      0.139 
   109       3     0.131      0.278      0.389 
   110       3     0.278      0.389      0.131 
   111       3     0.861      0.028      0.381 
   112       3     0.028      0.381      0.861 
   113       3     0.369      0.778      0.389 
   114       3     0.778      0.389      0.369 
   115       1     0.089      0.625      0.161 
   116       1     0.625      0.161      0.089 
   117       3     0.631      0.222      0.611 
   118       3     0.222      0.611      0.631 
   119       3     0.631      0.278      0.111 
   120       3     0.278      0.111      0.631 
   121       1     0.911      0.125      0.339 
   122       1     0.125      0.339      0.911 
   123       3     0.369      0.722      0.889 
   124       3     0.722      0.889      0.369 
   125       3     0.369      0.278      0.611 
   126       3     0.278      0.611      0.369 
   127       1     0.089      0.125      0.839 
   128       1     0.125      0.839      0.089 
   129       3     0.631      0.722      0.389 
   130       3     0.722      0.389      0.631 
   131       3     0.631      0.778      0.889 
   132       3     0.778      0.889      0.631 
   133       1     0.911      0.625      0.661 
   134       1     0.625      0.661      0.911 
   135       3     0.369      0.222      0.111 
   136       3     0.222      0.111      0.369 
   137       3     0.381      0.139      0.472 
   138       3     0.119      0.861      0.972 
   139       3     0.119      0.361      0.028 
   140       3     0.381      0.639      0.528 
   141       3     0.619      0.139      0.972 
   142       3     0.881      0.861      0.472 
   143       3     0.881      0.361      0.528 
   144       3     0.619      0.639      0.028 
   145       3     0.639      0.028      0.619 
   146       3     0.528      0.881      0.361 
   147       3     0.361      0.528      0.881 
   148       3     0.028      0.619      0.639 
   149       3     0.861      0.472      0.881 
   150       3     0.972      0.619      0.139 
   151       3     0.139      0.972      0.619 
   152       3     0.472      0.881      0.861 
   153       3     0.639      0.528      0.381 
   154       3     0.028      0.119      0.361 
   155       3     0.361      0.028      0.119 
   156       3     0.528      0.381      0.639 
   157       3     0.861      0.972      0.119 
   158       3     0.472      0.381      0.139 
   159       3     0.139      0.472      0.381 
   160       3     0.972      0.119      0.861 


X-ray density (g/cm cub.)   =      3.55

MU (1/cm) =     726.342    Mass attenuation coefficient (cm**2/g) =    204.48 

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

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

    1   Si   ,Fe             2.592        4
                                                 1.5973       3
                                                 1.6283       3
                                                 1.6283       3
                                                 1.5973       3
    2    Cs                  3.612       12
                                                 3.5919       3
                                                 3.4864       3
                                                 3.5919       3
                                                 3.5919       3
                                                 3.5919       3
                                                 3.4864       3
                                                 3.4864       3
                                                 3.5919       3
                                                 3.5919       3
                                                 3.4864       3
                                                 3.4864       3
                                                 3.4864       3
    3    O                   3.264        6
                                                 2.6545       3
                                                 2.616        3
                                                 2.6122       3
                                                 2.6122       3
                                                 2.616        3
                                                 2.6902       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   1   1   2  9.23   18.459   0.09    74.81   24       65.7      119.1
    2   2   2   0 10.673  21.346   0.104   55.4    12       73.1       54.7
    3   3   2   1 14.182  28.364   0.137   30.49   48      327.7     2418.2
    4   4   0   0 15.184  30.368   0.146   26.35    6     1524.6     5656.2
    5   4   2   0 17.028  34.056   0.164   20.57   24       85.7       55.8
    6   3   3   2 17.886  35.773   0.172   18.47   24      621.3     2634.5
    7   2   2   4 18.71   37.421   0.179   16.73   24       58.2       20.9
    8   4   3   1 19.505  39.009   0.187   15.26   48      123.3      171.5
    9   5   2   1 21.017  42.035   0.2     12.92   48      143.9      197.7
   10   4   4   0 21.741  43.482   0.207   11.98   12      935.0     1934.0
   11   1   1   6 23.806  47.613   0.226    9.76   24      147.6       78.5
   12   5   3   2 23.806  47.613   0.226    9.76   48      286.9      593.5
   13   6   2   0 24.465  48.93    0.231    9.17   24      108.5       39.9
   14   5   4   1 25.11   50.22    0.237    8.64   48       26.6        4.5
   15   6   3   1 26.366  52.733   0.248    7.73   48      295.9      500.4
   16   4   4   4 26.979  53.958   0.254    7.34    8      544.1      267.5
   17   5   4   3 27.582  55.164   0.259    6.98   48       69.8       25.1
   18   6   4   0 28.176  56.352   0.264    6.65   24      161.3       63.9
   19   3   3   6 28.762  57.525   0.269    6.35   24      478.9      537.7
   20   5   5   2 28.762  57.525   0.269    6.35   24      242.6      138.0
   21   7   2   1 28.762  57.525   0.269    6.35   48      337.1      532.8
   22   6   4   2 29.341  58.682   0.274    6.07   48       90.4       36.6
   23   6   5   1 31.037  62.074   0.288    5.35   48      170.8      115.4
   24   7   3   2 31.037  62.074   0.288    5.35   48      566.2     1267.8
   25   8   0   0 31.59   63.181   0.293    5.15    6      958.5      436.9
   26   7   4   1 32.138  64.276   0.297    4.96   48      165.6      100.4
   27   8   2   0 32.681  65.362   0.302    4.78   24      119.1       25.1
   28   6   5   3 33.219  66.439   0.306    4.62   48      243.9      203.0
   29   2   2   8 33.753  67.507   0.311    4.47   24       46.5        3.6
   30   6   6   0 33.753  67.507   0.311    4.47   12      163.1       21.9
   31   7   4   3 34.283  68.566   0.315    4.32   48       63.9       13.0
   32   8   3   1 34.283  68.566   0.315    4.32   48      146.5       68.6
   33   7   5   2 35.331  70.663   0.323    4.07   48      328.9      325.0
   34   8   4   0 35.851  71.701   0.327    3.95   24      663.1      641.9
   35   8   4   2 36.88   73.759   0.335    3.74   48       57.9        9.3
   36   5   5   6 37.39   74.78    0.339    3.65   24      246.5       81.9
   37   7   6   1 37.39   74.78    0.339    3.65   48      290.8      227.9
   38   9   2   1 37.39   74.78    0.339    3.65   48       48.8        6.4
   39   6   6   4 37.898  75.796   0.343    3.56   24      131.7       22.8
   40   7   5   4 38.404  76.808   0.347    3.48   48      121.0       37.6
   41   8   5   1 38.404  76.808   0.347    3.48   48       31.6        2.6
   42   7   6   3 39.409  78.818   0.355    3.33   48      432.4      460.4
   43   9   3   2 39.409  78.818   0.355    3.33   48       79.1       15.4
   44   4   4   8 39.909  79.818   0.359    3.27   24      454.7      249.4
   45   8   5   3 40.408  80.815   0.362    3.21   48       87.1       18.0
   46   9   4   1 40.408  80.815   0.362    3.21   48       51.7        6.3
   47   8   6   0 40.905  81.809   0.366    3.15   24      215.6       54.0
   48   1   1  10 41.4    82.801   0.37     3.1    24      443.9      225.4
   49   7   7   2 41.4    82.801   0.37     3.1    24      568.1      369.1
   50   8   6   2 41.895  83.79    0.373    3.05   48       80.1       14.5
   51  10   2   0 41.895  83.79    0.373    3.05   24       78.0        6.9
   52   9   4   3 42.389  84.778   0.377    3.0    48       25.5        1.4
   53   7   6   5 43.374  86.749   0.384    2.93   48      271.9      159.8
   54   9   5   2 43.374  86.749   0.384    2.93   48      223.5      108.0
   55  10   3   1 43.374  86.749   0.384    2.93   48      433.0      405.4
   56   8   7   1 44.358  88.716   0.391    2.86   48      208.2       91.7
   57   8   6   4 44.849  89.698   0.394    2.84   48       93.5       18.3
   58  10   4   0 44.849  89.698   0.394    2.84   24      140.9       20.8


  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   1   1   2   9.23   18.459  5.57667      119.1      2.1      2.1     5.6
    2   3   2   1  14.182  28.364  3.65079     2418.2     42.8     42.8     5.6
    3   4   0   0  15.184  30.368  3.415       5656.2    100.0    100.0     5.6
    4   3   3   2  17.886  35.773  2.91232     2634.5     46.6     46.4     5.7
    5   4   3   1  19.505  39.009  2.67895      171.5      3.0      3.0     5.7
    6   5   2   1  21.017  42.035  2.49396      197.7      3.5      3.5     5.7
    7   4   4   0  21.741  43.482  2.41477     1934.0     34.2     33.8     5.7
    8   5   3   2  23.806  47.613  2.21594      672.0     11.9     11.7     5.7
    9   6   3   1  26.366  52.733  2.01406      500.4      8.8      8.6     5.8
   10   4   4   4  26.979  53.958  1.97165      267.5      4.7      4.6     5.8
   11   6   4   0  28.176  56.352  1.8943        63.9      1.1      1.1     5.8
   12   3   3   6  28.762  57.525  1.85889     1208.5     21.4     20.7     5.8
   13   7   3   2  31.037  62.074  1.73482     1383.2     24.5     23.6     5.8
   14   8   0   0  31.59   63.181  1.7075       436.9      7.7      7.4     5.9
   15   7   4   1  32.138  64.276  1.68143      100.4      1.8      1.7     5.9
   16   6   5   3  33.219  66.439  1.63268      203.0      3.6      3.4     5.9
   17   8   3   1  34.283  68.566  1.58794       81.6      1.4      1.4     5.9
   18   7   5   2  35.331  70.663  1.54669      325.0      5.7      5.5     5.9
   19   8   4   0  35.851  71.701  1.52723      641.9     11.3     10.8     5.9
   20   7   6   1  37.39   74.78   1.473        316.3      5.6      5.3     6.0
   21   7   6   3  39.409  78.818  1.40892      475.8      8.4      7.9     6.0
   22   4   4   8  39.909  79.818  1.39417      249.4      4.4      4.1     6.0
   23   7   7   2  41.4    82.801  1.35254      594.6     10.5      9.7     6.1
   24  10   3   1  43.374  86.749  1.30243      673.2     11.9     10.9     6.1
   25   8   7   1  44.358  88.716  1.27938       91.7      1.6      1.5     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)