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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FERBERITE

2, light, s-ferberite

(Fe,Mn,Mg)(2.21)W(1.91)O(8)


Monoclinic  P 2/c  Z = 1

R =0.07

28 .11 .1989

Ref.Str.:

         C.Escobar, H.Cid-Dresdner, P.Kittl, I.Dumler (1971)

         * Amer. Mineral., 56, 489-498

                   Initial data from BDM-file 

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

             a =   4.753    alpha =   90.0 
             b =   5.72     beta  =   90.08
             c =   4.968    gamma =   90.0 

    Unit cell volume (cub. angs.) =   135.07

    Molar volume ( cub.cm/mol.) =    81.36

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

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

   1 0.0     0.1808  0.25     0.2    W     = 1.00
   2 0.5     0.3215  0.75     0.45   Fe    = 1.00
   3 0.2167  0.1017  0.5883   0.6    O     = 1.00
   4 0.2583  0.39    0.09     0.6    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.0        0.1808     0.25  
     2       2     0.5        0.3215     0.75  
     3       3     0.2167     0.1017     0.5883
     4       4     0.2583     0.39       0.09  
     5       3     0.7833     0.1017     0.9117
     6       4     0.7417     0.39       0.41  
     7       1     0.0        0.8192     0.75  
     8       2     0.5        0.6785     0.25  
     9       3     0.2167     0.8983     0.0883
    10       4     0.2583     0.61       0.59  
    11       3     0.7833     0.8983     0.4117
    12       4     0.7417     0.61       0.91  


X-ray density (g/cm cub.)   =      7.46

MU (1/cm) =    1243.827    Mass attenuation coefficient (cm**2/g) =    166.622

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

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

    1    W                   2.448        6
                                                 2.0212       3
                                                 1.8904       4
                                                 2.0212       3
                                                 1.8904       4
                                                 2.0784       3
                                                 2.0784       3
    2    Fe                  2.592        6
                                                 2.009        3
                                                 2.0813       4
                                                 2.009        3
                                                 2.0813       4
                                                 2.1615       4
                                                 2.1615       4
    3    O                   3.264       12
                                                 2.9949       4
                                                 2.9813       4
                                                 3.134        3
                                                 2.6142       3
                                                 3.1204       4
                                                 2.9318       4
                                                 2.743        3
                                                 2.743        3
                                                 2.9142       4
                                                 2.8195       4
                                                 3.0631       3
                                                 2.5222       3
    4    O                   3.264       12
                                                 2.9813       3
                                                 2.9949       3
                                                 3.1204       3
                                                 2.9318       3
                                                 2.7922       4
                                                 2.927        4
                                                 2.9142       3
                                                 2.8195       3
                                                 2.7846       4
                                                 2.7846       4
                                                 2.7691       4
                                                 2.8993       4

  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   1   0  8.997  17.993   0.087   78.86    2       39.5     1349.3
    2   1   0   0 10.847  21.694   0.105   53.57    2       96.3     5446.0
    3   0   1   1 13.796  27.593   0.133   32.33    4       82.5     4819.0
    4   1   1   0 14.163  28.326   0.137   30.58    4       81.0     4402.8
    5   1   1  -1 17.676  35.351   0.17    18.96    4      151.2     9500.3
    6   1   1   1 17.694  35.389   0.17    18.91    4      153.1     9727.1
    7   0   2   0 18.225  36.45    0.175   17.73    2       96.9     1823.4
    8   0   0   2 21.106  42.211   0.201   12.8     2      144.0     2910.2
    9   0   2   1 21.154  42.307   0.202   12.74    4      102.7     2946.2
   10   1   2   0 21.408  42.815   0.204   12.4     4       54.1      797.2
   11   2   0   0 22.109  44.219   0.21    11.53    2      120.5     1835.5
   12   0   1   2 23.115  46.23    0.219   10.43    4       33.9      262.8
   13   1   0  -2 23.958  47.916   0.227    9.62    2       45.4      217.2
   14   1   0   2 23.987  47.974   0.227    9.59    2      116.7     1433.1
   15   1   2  -1 24.009  48.017   0.227    9.57    4       93.3     1827.5
   16   1   2   1 24.023  48.047   0.228    9.56    4       28.2      167.2
   17   2   1   0 24.052  48.104   0.228    9.53    4       34.9      254.5
   18   1   1  -2 25.794  51.588   0.243    8.13    4       63.3      715.1
   19   1   1   2 25.822  51.643   0.243    8.11    4       63.6      718.8
   20   2   1  -1 26.446  52.892   0.249    7.68    4       77.4     1009.6
   21   2   1   1 26.473  52.946   0.249    7.66    4       67.7      769.5
   22   0   3   0 27.977  55.955   0.262    6.76    2       74.1      407.1
   23   0   2   2 28.486  56.972   0.267    6.49    4       98.7     1385.5
   24   2   2   0 29.298  58.597   0.274    6.09    4      101.8     1382.4
   25   0   3   1 30.165  60.329   0.281    5.7     4       22.5       63.2
   26   1   3   0 30.362  60.724   0.283    5.62    4      141.9     2481.2
   27   1   2  -2 30.833  61.667   0.287    5.43    4       58.3      404.8
   28   1   2   2 30.858  61.716   0.287    5.42    4       44.6      236.1
   29   2   0  -2 31.367  62.735   0.291    5.23    2      152.2     1328.8
   30   2   2  -1 31.416  62.832   0.291    5.21    4      129.6     1920.6
   31   2   0   2 31.416  62.832   0.291    5.21    2      160.8     1476.6
   32   2   2   1 31.44   62.881   0.292    5.2     4      121.8     1692.0
   33   1   3  -1 32.444  64.889   0.3      4.86    4       37.2      147.2
   34   1   3   1 32.456  64.913   0.3      4.85    4       38.5      157.8
   35   2   1  -2 32.923  65.845   0.304    4.71    4       26.3       71.5
   36   2   1   2 32.97   65.94    0.304    4.69    4       37.5      144.4
   37   0   1   3 34.216  68.432   0.314    4.34    4       68.5      446.5
   38   3   0   0 34.372  68.744   0.316    4.3     2       69.5      227.8
   39   3   1   0 35.861  71.722   0.327    3.95    4       49.2      209.4
   40   0   3   2 36.256  72.511   0.331    3.87    4       72.5      445.7
   41   1   1  -3 36.351  72.702   0.331    3.85    4      123.8     1293.3
   42   1   1   3 36.385  72.77    0.332    3.84    4      124.5     1304.5
   43   2   3   0 36.973  73.947   0.336    3.72    4       73.7      443.1
   44   2   2  -2 37.391  74.782   0.339    3.65    4       83.7      560.6
   45   2   2   2 37.436  74.872   0.34     3.64    4       81.3      527.8
   46   3   1  -1 37.78   75.56    0.342    3.58    4      124.7     1221.3
   47   3   1   1 37.814  75.628   0.343    3.58    4      121.4     1156.0
   48   1   3  -2 38.349  76.699   0.347    3.49    4      128.5     1262.2
   49   1   3   2 38.372  76.743   0.347    3.48    4      124.8     1190.2
   50   0   2   3 38.619  77.239   0.349    3.45    4      125.8     1196.0
   51   0   4   0 38.719  77.437   0.35     3.43    2       46.5       81.3
   52   2   3  -1 38.878  77.756   0.351    3.41    4       15.5       17.9
   53   2   3   1 38.9    77.8     0.351    3.4     4       25.9       49.9
   54   3   2   0 40.196  80.392   0.361    3.23    4       49.1      170.9
   55   0   4   1 40.609  81.218   0.364    3.18    4      132.0     1215.9
   56   1   2  -3 40.668  81.337   0.364    3.17    4       59.1      242.8
   57   1   2   3 40.701  81.403   0.365    3.17    4       53.9      201.7
   58   1   4   0 40.783  81.566   0.365    3.16    4       12.0       10.1
   59   3   0  -2 42.006  84.011   0.374    3.04    2       93.1      288.6
   60   3   2  -1 42.054  84.109   0.374    3.03    4       39.0      101.3
   61   3   0   2 42.071  84.142   0.375    3.03    2       54.5       98.7
   62   3   2   1 42.087  84.174   0.375    3.03    4       74.2      365.9
   63   2   1  -3 42.55   85.1     0.378    2.99    4       66.1      286.5
   64   2   1   3 42.615  85.23    0.378    2.98    4       65.3      279.4
   65   1   4  -1 42.647  85.294   0.379    2.98    4       62.0      251.2
   66   1   4   1 42.658  85.316   0.379    2.98    4       80.0      418.8
   67   3   1  -2 43.411  86.822   0.384    2.92    4       54.4      189.7
   68   3   1   2 43.476  86.953   0.385    2.92    4       56.8      206.6
   69   2   3  -2 44.486  88.971   0.392    2.86    4       64.8      262.7
   70   2   3   2 44.529  89.058   0.392    2.85    4       68.6      294.0


  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   1   0   8.997  17.993  5.72        1349.3      7.0      7.1     5.6
    2   1   0   0  10.847  21.694  4.753       5446.0     28.3     28.6     5.6
    3   0   1   1  13.796  27.593  3.7508      4819.0     25.1     25.2     5.6
    4   1   1   0  14.163  28.326  3.65565     4402.8     22.9     23.0     5.6
    5   1   1   1  17.694  35.389  2.9429     19227.4    100.0    100.0     5.7
    6   0   2   0  18.225  36.45   2.86        1823.4      9.5      9.5     5.7
    7   0   0   2  21.106  42.211  2.484       2910.2     15.1     15.0     5.7
    8   0   2   1  21.154  42.307  2.47862     2946.2     15.3     15.2     5.7
    9   1   2   0  21.408  42.815  2.45056      797.2      4.1      4.1     5.7
   10   2   0   0  22.109  44.219  2.3765      1835.5      9.5      9.5     5.7
   11   0   1   2  23.115  46.23   2.27843      262.8      1.4      1.4     5.7
   12   1   0  -2  23.958  47.916  2.20274      217.2      1.1      1.1     5.7
   13   1   2  -1  24.009  48.017  2.19836     3427.8     17.8     17.6     5.7
   14   2   1   0  24.052  48.104  2.19462      254.5      1.3      1.3     5.7
   15   1   1   2  25.822  51.643  2.05354     1433.9      7.5      7.3     5.8
   16   2   1  -1  26.446  52.892  2.00843     1779.1      9.3      9.1     5.8
   17   0   3   0  27.977  55.955  1.90667      407.1      2.1      2.1     5.8
   18   0   2   2  28.486  56.972  1.8754      1385.5      7.2      7.0     5.8
   19   2   2   0  29.298  58.597  1.82782     1382.4      7.2      7.0     5.8
   20   1   3   0  30.362  60.724  1.76959     2481.2     12.9     12.5     5.8
   21   1   2  -2  30.833  61.667  1.74514      640.9      3.3      3.2     5.8
   22   2   0  -2  31.367  62.735  1.71838     1328.8      6.9      6.7     5.9
   23   2   2  -1  31.416  62.832  1.716       5089.3     26.5     25.6     5.9
   24   1   3   1  32.456  64.913  1.66672      304.9      1.6      1.5     5.9
   25   0   1   3  34.216  68.432  1.59068      446.5      2.3      2.2     5.9
   26   3   0   0  34.372  68.744  1.58433      227.8      1.2      1.1     5.9
   27   3   1   0  35.861  71.722  1.52685      209.4      1.1      1.0     5.9
   28   0   3   2  36.256  72.511  1.51248      445.7      2.3      2.2     5.9
   29   1   1  -3  36.351  72.702  1.50905     1293.3      6.7      6.4     6.0
   30   1   1   3  36.385  72.77   1.50784     1304.5      6.8      6.5     6.0
   31   2   3   0  36.973  73.947  1.48719      443.1      2.3      2.2     6.0
   32   2   2  -2  37.391  74.782  1.47296      560.6      2.9      2.8     6.0
   33   2   2   2  37.436  74.872  1.47145      527.8      2.7      2.6     6.0
   34   3   1  -1  37.78   75.56   1.46002     1221.3      6.4      6.0     6.0
   35   3   1   1  37.814  75.628  1.45892     1156.0      6.0      5.7     6.0
   36   1   3  -2  38.349  76.699  1.44162     2452.4     12.8     12.0     6.0
   37   0   2   3  38.619  77.239  1.4331      1196.0      6.2      5.9     6.0
   38   0   4   1  40.609  81.218  1.3742      1215.9      6.3      5.9     6.1
   39   1   2  -3  40.668  81.337  1.37255      242.8      1.3      1.2     6.1
   40   1   2   3  40.701  81.403  1.37163      201.7      1.0      1.0     6.1
   41   3   0  -2  42.006  84.011  1.33661      288.6      1.5      1.4     6.1
   42   3   2  -1  42.054  84.109  1.33534      200.0      1.0      1.0     6.1
   43   3   2   1  42.087  84.174  1.3345       365.9      1.9      1.8     6.1
   44   2   1  -3  42.55   85.1    1.32271      286.5      1.5      1.4     6.1
   45   2   1   3  42.615  85.23   1.32107      279.4      1.5      1.3     6.1
   46   1   4   1  42.658  85.316  1.32         670.0      3.5      3.2     6.1
   47   3   1   2  43.476  86.953  1.29998      206.6      1.1      1.0     6.1
   48   2   3  -2  44.486  88.971  1.27647      262.7      1.4      1.3     6.2
   49   2   3   2  44.529  89.058  1.27549      294.0      1.5      1.4     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)