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

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

10, t-gillespite, at 9 kbar, f-gillespite

BaFeSi(4)O(10)


Tetragonal  * P4/ncc  Z = 4

*P4/ncc

21 .6 .16

Ref.Str.:

         Hazen R.M., Finger L.W. (1983)

         * Amer. Mineral., 68, 595-603

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

                   Initial data from BDM-file 

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

             a =   7.492    alpha =   90.0 
             b =   7.492    beta  =   90.0 
             c =  15.943    gamma =   90.0 

    Unit cell volume (cub. angs.) =   894.88

    Molar volume ( cub.cm/mol.) =   134.76

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

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

   1 0.25    0.75    0.0      0.0    Ba    = 1.00
   2 0.25    0.25    0.0908   0.0    Fe    = 1.00
   3 0.5195  0.9365  0.155    0.0    Si    = 1.00
   4 0.4726  0.9726  0.25     0.0    O     = 1.00
   5 0.7232  0.9978  0.1358   0.0    O     = 1.00
   6 0.3907  0.0292  0.0926   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.25       0.75       0.0   
     2       2     0.25       0.25       0.0908
     3       3     0.5195     0.9365     0.155 
     4       4     0.4726     0.9726     0.25  
     5       5     0.7232     0.9978     0.1358
     6       6     0.3907     0.0292     0.0926
     7       1     0.75       0.25       0.0   
     8       3     0.5635     0.5195     0.155 
     9       3     0.9805     0.5635     0.155 
    10       3     0.9365     0.9805     0.155 
    11       4     0.5274     0.4726     0.25  
    12       4     0.0274     0.5274     0.25  
    13       4     0.9726     0.0274     0.25  
    14       5     0.5022     0.7232     0.1358
    15       5     0.7768     0.5022     0.1358
    16       5     0.9978     0.7768     0.1358
    17       6     0.4708     0.3907     0.0926
    18       6     0.1093     0.4708     0.0926
    19       6     0.0292     0.1093     0.0926
    20       1     0.25       0.75       0.5   
    21       2     0.25       0.25       0.5908
    22       3     0.9805     0.9365     0.655 
    23       4     0.0274     0.9726     0.75  
    24       5     0.7768     0.9978     0.6358
    25       6     0.1093     0.0292     0.5926
    26       1     0.75       0.25       0.5   
    27       3     0.9365     0.5195     0.655 
    28       3     0.5195     0.5635     0.655 
    29       3     0.5635     0.9805     0.655 
    30       4     0.9726     0.4726     0.75  
    31       4     0.4726     0.5274     0.75  
    32       4     0.5274     0.0274     0.75  
    33       5     0.9978     0.7232     0.6358
    34       5     0.7232     0.5022     0.6358
    35       5     0.5022     0.7768     0.6358
    36       6     0.0292     0.3907     0.5926
    37       6     0.3907     0.4708     0.5926
    38       6     0.4708     0.1093     0.5926
    39       2     0.75       0.75       0.9092
    40       3     0.0195     0.4365     0.845 
    41       5     0.2232     0.4978     0.8642
    42       6     0.8907     0.5292     0.9074
    43       3     0.0635     0.0195     0.845 
    44       3     0.4805     0.0635     0.845 
    45       3     0.4365     0.4805     0.845 
    46       5     0.0022     0.2232     0.8642
    47       5     0.2768     0.0022     0.8642
    48       5     0.4978     0.2768     0.8642
    49       6     0.9708     0.8907     0.9074
    50       6     0.6093     0.9708     0.9074
    51       6     0.5292     0.6093     0.9074
    52       2     0.75       0.75       0.4092
    53       3     0.4805     0.4365     0.345 
    54       5     0.2768     0.4978     0.3642
    55       6     0.6093     0.5292     0.4074
    56       3     0.4365     0.0195     0.345 
    57       3     0.0195     0.0635     0.345 
    58       3     0.0635     0.4805     0.345 
    59       5     0.4978     0.2232     0.3642
    60       5     0.2232     0.0022     0.3642
    61       5     0.0022     0.2768     0.3642
    62       6     0.5292     0.8907     0.4074
    63       6     0.8907     0.9708     0.4074
    64       6     0.9708     0.6093     0.4074


X-ray density (g/cm cub.)   =      3.45

MU (1/cm) =     592.609    Mass attenuation coefficient (cm**2/g) =    171.564

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

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

    1    Ba                  3.288        8
                                                 2.7688       6
                                                 2.8806       5
                                                 2.8806       5
                                                 2.7688       6
                                                 2.8806       5
                                                 2.8806       5
                                                 2.7688       6
                                                 2.7688       6
    2    Fe                  2.592        4
                                                 1.9618       6
                                                 1.9618       6
                                                 1.9618       6
                                                 1.9618       6
    3    Si                  2.1          4
                                                 1.5782       4
                                                 1.6229       5
                                                 1.5502       6
                                                 1.6323       5
    4    O                   3.264        6
                                                 2.6221       5
                                                 2.6179       6
                                                 2.6183       5
                                                 2.6221       5
                                                 2.6183       5
                                                 2.6179       6
    5    O                   3.264        6
                                                 2.6221       4
                                                 2.5952       6
                                                 2.6183       4
                                                 2.6408       5
                                                 2.6408       5
                                                 2.5353       6
    6    O                   3.264        5
                                                 2.6179       4
                                                 2.5952       5
                                                 2.5353       5
                                                 2.774        6
                                                 2.774        6

  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  6.443  12.885   0.063  155.89    2      149.1      865.0
    2   1   0   2  9.43   18.86    0.092   71.58    8       26.1       48.6
    3   1   1   0  9.72   19.441   0.094   67.24    4       87.6      257.9
    4   1   1   2 11.696  23.393   0.113   45.78    8      158.9     1155.3
    5   0   0   4 12.968  25.937   0.125   36.85    2      121.1      135.0
    6   2   0   0 13.814  27.629   0.133   32.24    4       21.2        7.3
    7   1   0   4 14.726  29.452   0.142   28.13    8      143.2      576.3
    8   2   0   2 15.297  30.595   0.147   25.93    8      307.9     2455.5
    9   2   1   1 15.831  31.661   0.152   24.09   16       58.4      164.1
   10   1   1   4 16.31   32.62    0.157   22.58    8      262.6     1556.0
   11   2   1   2 16.833  33.666   0.162   21.09   16      133.2      747.8
   12   2   1   3 18.396  36.793   0.176   17.37   16       16.6        9.5
   13   2   0   4 19.128  38.256   0.183   15.94    8      220.9      777.0
   14   0   0   6 19.671  39.342   0.188   14.98    2      149.0       83.0
   15   2   2   0 19.736  39.471   0.189   14.87    4      340.7      862.1
   16   2   1   4 20.411  40.822   0.195   13.8    16        3.8        0.4
   17   2   2   2 20.845  41.689   0.199   13.16    8      151.5      301.9
   18   1   0   6 20.926  41.853   0.2     13.05    8       23.3        7.1
   19   3   0   2 22.045  44.09    0.21    11.61    8       70.4       57.5
   20   1   1   6 22.123  44.245   0.211   11.52    8      252.5      733.7
   21   3   1   0 22.181  44.363   0.211   11.45    8      135.1      208.7
   22   3   1   1 22.438  44.876   0.213   11.16   16       37.9       31.9
   23   2   1   5 22.783  45.566   0.216   10.78   16        2.5        0.1
   24   3   1   2 23.195  46.39    0.22    10.35   16      145.7      438.7
   25   2   2   4 23.919  47.839   0.227    9.65    8      150.4      218.3
   26   2   0   6 24.375  48.75    0.231    9.25    8       68.1       42.8
   27   3   1   3 24.416  48.832   0.231    9.21   16        5.3        0.5
   28   3   0   4 25.003  50.006   0.236    8.73    8       39.1       13.3
   29   2   1   6 25.444  50.888   0.24     8.39   16       61.9       64.1
   30   3   2   1 25.728  51.456   0.243    8.18   16       57.5       54.0
   31   3   1   4 26.053  52.106   0.246    7.95   16      184.5      540.3
   32   3   2   2 26.413  52.827   0.249    7.7    16       58.5       52.7
   33   0   0   8 26.669  53.337   0.251    7.54    2      263.2      130.4
   34   3   2   3 27.529  55.058   0.258    7.01   16       27.8       10.8
   35   1   0   8 27.674  55.347   0.26     6.93    8      156.6      169.8
   36   3   1   5 28.057  56.114   0.263    6.71   16       56.0       42.1
   37   2   1   7 28.351  56.702   0.265    6.56   16       11.5        1.7
   38   2   2   6 28.477  56.954   0.267    6.49    8      106.0       72.9
   39   4   0   0 28.526  57.052   0.267    6.47    4      378.6      462.9
   40   1   1   8 28.655  57.31    0.268    6.4     8      172.3      189.9
   41   3   2   4 29.042  58.084   0.271    6.21   16      123.1      188.0
   42   4   0   2 29.377  58.755   0.274    6.05    8      129.3      101.0
   43   3   0   6 29.441  58.882   0.275    6.02    8       12.7        1.0
   44   4   1   1 29.699  59.397   0.277    5.91   16       67.6       53.9
   45   4   1   2 30.323  60.647   0.282    5.64   16       17.1        3.3
   46   3   1   6 30.386  60.771   0.283    5.61   16      227.4      579.7
   47   3   3   0 30.433  60.865   0.283    5.59    4       22.9        1.5
   48   2   0   8 30.557  61.114   0.284    5.54    8      108.8       65.5
   49   3   2   5 30.917  61.834   0.287    5.4    16        9.9        1.1
   50   3   3   2 31.252  62.504   0.29     5.27    8      123.6       80.5
   51   4   1   3 31.348  62.696   0.291    5.24   16        5.9        0.4
   52   2   1   8 31.481  62.963   0.292    5.19   16        1.4        0.0
   53   4   0   4 31.847  63.694   0.295    5.06    8       42.6        9.2
   54   4   2   0 32.271  64.542   0.298    4.92    8      187.8      173.2
   55   4   2   1 32.47   64.941   0.3      4.85   16       11.4        1.3
   56   4   1   4 32.751  65.503   0.302    4.76   16       81.6       63.3
   57   3   1   7 33.009  66.017   0.305    4.68   16       29.6        8.2
   58   4   2   2 33.065  66.129   0.305    4.67   16      227.0      480.3
   59   3   2   6 33.124  66.248   0.305    4.65   16       23.5        5.1
   60   3   3   4 33.643  67.285   0.31     4.5     8      252.5      286.5
   61   4   2   3 34.044  68.087   0.313    4.39   16        2.2        0.0
   62   0   0  10 34.127  68.255   0.314    4.36    2       68.6        5.1
   63   2   2   8 34.172  68.343   0.314    4.35    8      123.8       66.6
   64   4   1   5 34.511  69.023   0.317    4.27   16       34.8       10.3
   65   2   1   9 34.831  69.662   0.319    4.19   16        1.2        0.0
   66   1   0  10 35.002  70.003   0.321    4.14    8       60.1       15.0
   67   3   0   8 35.045  70.09    0.321    4.13    8       48.5        9.7
   68   4   2   4 35.392  70.784   0.324    4.05   16       93.4       70.7
   69   3   2   7 35.64   71.28    0.326    4.0    16       11.2        1.0
   70   4   0   6 35.752  71.503   0.327    3.97    8      139.9       77.7
   71   1   1  10 35.866  71.732   0.328    3.95    8       94.5       35.2
   72   3   1   8 35.909  71.818   0.328    3.94   16      156.3      192.3
   73   4   1   6 36.609  73.217   0.333    3.8    16       15.5        1.8
   74   4   3   1 36.839  73.679   0.335    3.75   16       79.1       46.9
   75   4   2   5 37.094  74.189   0.337    3.7    16       16.0        1.9
   76   4   3   2 37.402  74.803   0.34     3.65   16       75.0       41.0
   77   5   0   2 37.402  74.803   0.34     3.65    8       37.4        5.1
   78   3   3   6 37.458  74.916   0.34     3.64    8      186.8      126.8
   79   5   1   0 37.5    75.001   0.34     3.63    8       51.7        9.7
   80   2   0  10 37.57   75.141   0.341    3.62    8      295.8      316.2
   81   5   1   1 37.687  75.374   0.342    3.6    16       17.8        2.3
   82   5   1   2 38.245  76.489   0.346    3.5    16      118.6       98.5
   83   4   3   3 38.332  76.664   0.347    3.49   16       21.8        3.3
   84   2   1  10 38.412  76.824   0.347    3.48   16       13.1        1.2
   85   3   2   8 38.454  76.908   0.348    3.47   16      144.4      144.6
   86   4   1   7 39.029  78.059   0.352    3.39   16        2.2        0.0
   87   3   1   9 39.085  78.17    0.352    3.38   16       42.8       12.4
   88   4   2   6 39.137  78.274   0.353    3.37   16       55.9       21.1
   89   5   1   3 39.169  78.337   0.353    3.37   16       76.1       39.0
   90   4   3   4 39.623  79.246   0.356    3.3    16       14.4        1.4
   91   5   0   4 39.623  79.246   0.356    3.3     8      123.1       50.0
   92   5   2   1 40.193  80.387   0.361    3.23   16       48.0       14.9
   93   5   1   4 40.452  80.904   0.363    3.2    16      209.2      279.9
   94   5   2   2 40.741  81.483   0.365    3.17   16      144.6      132.4
   95   2   2  10 40.906  81.812   0.366    3.15    8      129.7       52.9
   96   4   0   8 40.947  81.895   0.366    3.14    8      197.0      121.8
   97   4   3   5 41.267  82.534   0.369    3.11   16       40.9       10.4
   98   4   2   7 41.514  83.028   0.371    3.08   16       12.1        0.9
   99   3   2   9 41.569  83.137   0.371    3.08   16        2.7        0.0
  100   5   2   3 41.651  83.302   0.372    3.07   16       22.9        3.2
  101   3   0  10 41.73   83.459   0.372    3.06    8       56.2        9.7
  102   4   1   8 41.771  83.542   0.372    3.06   16       99.3       60.2
  103   5   1   5 42.089  84.179   0.375    3.03   16       39.9        9.7
  104   2   1  11 42.253  84.506   0.376    3.02   16       34.7        7.2
  105   0   0  12 42.318  84.636   0.376    3.01    2      294.0       65.0
  106   4   4   0 42.482  84.965   0.378    3.0     4      214.5       68.9
  107   3   1  10 42.55   85.101   0.378    2.99   16       89.5       47.8
  108   3   3   8 42.592  85.183   0.378    2.99    8      154.3       71.0
  109   5   2   4 42.919  85.839   0.381    2.96   16       10.5        0.7
  110   1   0  12 43.137  86.274   0.382    2.94    8       85.5       21.5
  111   4   4   2 43.206  86.412   0.383    2.94    8      128.9       48.8
  112   4   3   6 43.26   86.521   0.383    2.93   16       15.3        1.4
  113   5   0   6 43.26   86.521   0.383    2.93    8       34.1        3.4
  114   1   1  12 43.955  87.91    0.388    2.89    8       82.7       19.7
  115   5   1   6 44.078  88.156   0.389    2.88   16      180.3      187.1
  116   5   3   0 44.119  88.238   0.389    2.88    8      134.6       52.1
  117   4   2   8 44.228  88.455   0.39     2.87   16      110.9       70.5
  118   5   3   1 44.299  88.599   0.39     2.87   16       31.4        5.6
  119   5   2   5 44.544  89.089   0.392    2.85   16       21.8        2.7
  120   5   3   2 44.84   89.681   0.394    2.84   16      109.1       67.5
  121   4   1   9 44.844  89.687   0.394    2.84   16       53.4       16.2


  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   6.443  12.885  7.9715       865.0     35.2     35.7     5.6
    2   1   0   2   9.43   18.86   5.45929       48.6      2.0      2.0     5.6
    3   1   1   0   9.72   19.441  5.29764      257.9     10.5     10.6     5.6
    4   1   1   2  11.696  23.393  4.41217     1155.3     47.0     47.3     5.6
    5   0   0   4  12.968  25.937  3.98575      135.0      5.5      5.5     5.6
    6   1   0   4  14.726  29.452  3.51878      576.3     23.5     23.5     5.6
    7   2   0   2  15.297  30.595  3.39032     2455.5    100.0    100.0     5.6
    8   2   1   1  15.831  31.661  3.2789       164.1      6.7      6.7     5.6
    9   1   1   4  16.31   32.62   3.18498     1556.0     63.4     63.3     5.6
   10   2   1   2  16.833  33.666  3.08878      747.8     30.5     30.4     5.7
   11   2   0   4  19.128  38.256  2.72965      777.0     31.6     31.4     5.7
   12   0   0   6  19.671  39.342  2.65717       83.0      3.4      3.4     5.7
   13   2   2   0  19.736  39.471  2.64882      862.1     35.1     34.8     5.7
   14   2   2   2  20.845  41.689  2.51368      301.9     12.3     12.2     5.7
   15   3   0   2  22.045  44.09   2.38312       57.5      2.3      2.3     5.7
   16   1   1   6  22.123  44.245  2.37514      733.7     29.9     29.5     5.7
   17   3   1   0  22.181  44.363  2.36918      208.7      8.5      8.4     5.7
   18   3   1   1  22.438  44.876  2.34344       31.9      1.3      1.3     5.7
   19   3   1   2  23.195  46.39   2.271        438.7     17.9     17.6     5.7
   20   2   2   4  23.919  47.839  2.20608      218.3      8.9      8.7     5.7
   21   2   0   6  24.375  48.75   2.16729       42.8      1.7      1.7     5.7
   22   2   1   6  25.444  50.888  2.08193       64.1      2.6      2.6     5.8
   23   3   2   1  25.728  51.456  2.06048       54.0      2.2      2.2     5.8
   24   3   1   4  26.053  52.106  2.03656      540.3     22.0     21.5     5.8
   25   3   2   2  26.413  52.827  2.01072       52.7      2.1      2.1     5.8
   26   0   0   8  26.669  53.337  1.99287      130.4      5.3      5.2     5.8
   27   1   0   8  27.674  55.347  1.9259       169.8      6.9      6.7     5.8
   28   3   1   5  28.057  56.114  1.9017        42.1      1.7      1.7     5.8
   29   2   2   6  28.477  56.954  1.87594       72.9      3.0      2.9     5.8
   30   4   0   0  28.526  57.052  1.873        462.9     18.9     18.3     5.8
   31   1   1   8  28.655  57.31   1.86526      189.9      7.7      7.5     5.8
   32   3   2   4  29.042  58.084  1.84255      188.0      7.7      7.4     5.8
   33   4   0   2  29.377  58.755  1.82335      101.0      4.1      4.0     5.8
   34   4   1   1  29.699  59.397  1.80539       53.9      2.2      2.1     5.8
   35   3   1   6  30.386  60.771  1.76835      579.7     23.6     22.8     5.8
   36   2   0   8  30.557  61.114  1.75939       65.5      2.7      2.6     5.8
   37   3   3   2  31.252  62.504  1.72408       80.5      3.3      3.2     5.8
   38   4   2   0  32.271  64.542  1.67526      173.2      7.1      6.8     5.9
   39   4   1   4  32.751  65.503  1.65337       63.3      2.6      2.5     5.9
   40   4   2   2  33.065  66.129  1.63945      480.3     19.6     18.7     5.9
   41   3   3   4  33.643  67.285  1.61452      286.5     11.7     11.2     5.9
   42   2   2   8  34.172  68.343  1.59249       66.6      2.7      2.6     5.9
   43   4   2   4  35.392  70.784  1.54439       70.7      2.9      2.7     5.9
   44   4   0   6  35.752  71.503  1.5309        77.7      3.2      3.0     5.9
   45   1   1  10  35.866  71.732  1.52666       35.2      1.4      1.4     5.9
   46   3   1   8  35.909  71.818  1.52508      192.3      7.8      7.4     5.9
   47   4   3   1  36.839  73.679  1.49183       46.9      1.9      1.8     6.0
   48   4   3   2  37.402  74.803  1.47261       46.1      1.9      1.8     6.0
   49   3   3   6  37.458  74.916  1.47072      126.8      5.2      4.9     6.0
   50   2   0  10  37.57   75.141  1.46697      316.2     12.9     12.1     6.0
   51   5   1   2  38.245  76.489  1.44496       98.5      4.0      3.8     6.0
   52   3   2   8  38.454  76.908  1.4383       144.6      5.9      5.5     6.0
   53   5   1   3  39.169  78.337  1.41617       39.0      1.6      1.5     6.0
   54   5   0   4  39.623  79.246  1.40256       51.4      2.1      2.0     6.0
   55   5   1   4  40.452  80.904  1.37861      279.9     11.4     10.6     6.1
   56   5   2   2  40.741  81.483  1.37051      132.4      5.4      5.0     6.1
   57   2   2  10  40.906  81.812  1.36596       52.9      2.2      2.0     6.1
   58   4   0   8  40.947  81.895  1.36482      121.8      5.0      4.6     6.1
   59   4   1   8  41.771  83.542  1.34272       60.2      2.5      2.3     6.1
   60   0   0  12  42.318  84.636  1.32858       65.0      2.6      2.4     6.1
   61   4   4   0  42.482  84.965  1.32441       68.9      2.8      2.6     6.1
   62   3   1  10  42.55   85.101  1.3227        47.8      1.9      1.8     6.1
   63   3   3   8  42.592  85.183  1.32167       71.0      2.9      2.7     6.1
   64   4   4   2  43.206  86.412  1.3065        48.8      2.0      1.8     6.1
   65   5   1   6  44.078  88.156  1.28582      187.1      7.6      7.0     6.2
   66   5   3   0  44.119  88.238  1.28487       52.1      2.1      1.9     6.2
   67   4   2   8  44.228  88.455  1.28236       70.5      2.9      2.6     6.2
   68   5   3   2  44.84   89.681  1.2685        83.6      3.4      3.1     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)