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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BROCKITE

1, g-rhabdophane

(Ca,Th)PO(4)[H(2)O]


Hexagonal  P 3(1)21  Z = 3

P3(1)21

24 .6 .1996

Ref.Str.:

         Rose C.L., Mooney (1948)

         * J. Chem. Phys., 16, 10-12, 1003

Ref.Composition & Lattice:

         Povarennih A.S. (1965)

         * Kristallohim. klassif. miner. vidov (in russian)

Reserv:

         N.A.D.

                   Initial data from BDM-file 

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

             a =   6.98     alpha =   90.0 
             b =   6.98     beta  =   90.0 
             c =   6.4      gamma =  120.0 

    Unit cell volume (cub. angs.) =   270.04

    Molar volume ( cub.cm/mol.) =    54.22

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

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

   1 0.0     0.5     0.1667   0.0    Ca    = 0.94, Th    = 0.06
   2 0.5     0.0     0.3333   0.0    P     = 1.00
   3 0.446   0.147   0.473    0.0    O     = 1.00
   4 0.554   0.853   0.473    0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.0        0.5        0.1667
     2       2     0.5        0.0        0.3333
     3       3     0.446      0.147      0.473 
     4       4     0.554      0.853      0.473 
     5       1     0.5        0.5        0.5   
     6       1     0.5        0.0        0.8333
     7       2     0.0        0.5        0.6667
     8       2     0.5        0.5        0.0   
     9       3     0.853      0.299      0.8063
    10       3     0.701      0.554      0.1397
    11       4     0.147      0.701      0.8063
    12       4     0.299      0.446      0.1397
    13       3     0.147      0.446      0.527 
    14       4     0.853      0.554      0.527 
    15       3     0.299      0.853      0.1937
    16       3     0.554      0.701      0.8603
    17       4     0.701      0.147      0.1937
    18       4     0.446      0.299      0.8603


X-ray density (g/cm cub.)   =      2.7 

MU (1/cm) =     252.417    Mass attenuation coefficient (cm**2/g) =     93.384

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

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

    1   Ca   ,Th             2.928        8
                                                 2.6268       3
                                                 2.3052       3
                                                 2.6268       4
                                                 2.3053       4
                                                 2.6267       3
                                                 2.6267       4
                                                 2.3052       3
                                                 2.3053       4
    2    P                   2.232        4
                                                 1.5429       3
                                                 1.5429       4
                                                 1.5429       3
                                                 1.5429       4
    3    O                   3.264        5
                                                 2.5152       4
                                                 2.8618       4
                                                 2.5208       3
                                                 2.5226       4
                                                 2.6965       4
    4    O                   3.264        5
                                                 2.5152       3
                                                 2.8618       3
                                                 2.5227       3
                                                 2.6964       3
                                                 2.5208       4

  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   0  7.321  14.642   0.083  120.21    6       55.3     3028.5
    2   1   0  -1 10.095  20.19    0.114   62.18    6        5.5       15.7
    3   1   0   1 10.095  20.19    0.114   62.18    6        5.5       15.7
    4   1   1   0 12.751  25.502   0.143   38.19    6       39.6      492.4
    5   1   1   1 14.56   29.12    0.163   28.82   12       10.0       47.9
    6   2   0   0 14.765  29.53    0.165   27.98    6       84.0     1623.2
    7   1   0  -2 15.805  31.61    0.177   24.17    6       67.6      909.3
    8   1   0   2 15.805  31.61    0.177   24.17    6       67.6      909.3
    9   2   0  -1 16.37   32.741   0.183   22.4     6       21.5       85.0
   10   2   0   1 16.37   32.741   0.183   22.4     6       21.5       84.9
   11   1   1   2 19.061  38.123   0.212   16.06   12       29.3      227.1
   12   2   1   0 19.703  39.406   0.219   14.92   12        3.2        2.6
   13   2   0  -2 20.522  41.043   0.228   13.63    6       27.3       83.9
   14   2   0   2 20.522  41.043   0.228   13.63    6       27.3       83.9
   15   2   1  -1 20.976  41.952   0.232   12.98   12       25.4      138.1
   16   2   1   1 20.976  41.952   0.232   12.98   12       25.4      138.1
   17   0   0   3 21.166  42.332   0.234   12.72    2       74.6      194.2
   18   3   0   0 22.475  44.95    0.248   11.11    6       39.1      139.9
   19   1   0  -3 22.513  45.026   0.249   11.07    6       17.8       29.0
   20   1   0   3 22.513  45.026   0.249   11.07    6       17.8       29.0
   21   3   0  -1 23.627  47.254   0.26     9.93    6       42.9      150.3
   22   3   0   1 23.627  47.254   0.26     9.93    6       42.9      150.2
   23   2   1  -2 24.472  48.945   0.269    9.16   12       56.8      486.7
   24   2   1   2 24.472  48.945   0.269    9.16   12       56.8      486.8
   25   1   1   3 25.036  50.071   0.275    8.7    12       11.1       17.5
   26   2   2   0 26.195  52.389   0.287    7.85    6       57.4      212.7
   27   2   0  -3 26.228  52.457   0.287    7.83    6       14.4       13.4
   28   2   0   3 26.228  52.457   0.287    7.83    6       14.4       13.4
   29   3   0  -2 26.856  53.713   0.293    7.42    6       70.9      306.8
   30   3   0   2 26.856  53.713   0.293    7.42    6       70.9      306.9
   31   2   2   1 27.228  54.456   0.297    7.19   12       19.0       42.9
   32   3   1   0 27.351  54.703   0.298    7.11   12       30.8      111.3
   33   3   1  -1 28.356  56.712   0.308    6.56   12       16.1       27.9
   34   3   1   1 28.356  56.712   0.308    6.56   12       16.1       27.9
   35   2   1  -3 29.604  59.207   0.321    5.95   12       16.6       26.9
   36   2   1   3 29.604  59.207   0.321    5.95   12       16.6       26.9
   37   1   0  -4 29.868  59.736   0.323    5.83    6       31.7       48.2
   38   1   0   4 29.868  59.736   0.323    5.83    6       31.7       48.2
   39   2   2   2 30.185  60.369   0.326    5.69   12       12.3       14.1
   40   4   0   0 30.644  61.289   0.331    5.51    6       63.9      185.1
   41   3   1  -2 31.244  62.488   0.337    5.28   12       41.8      151.5
   42   3   1   2 31.244  62.488   0.337    5.28   12       41.8      151.4
   43   4   0  -1 31.583  63.165   0.34     5.15    6       11.7        5.8
   44   4   0   1 31.583  63.165   0.34     5.15    6       11.7        5.8
   45   3   0  -3 31.725  63.45    0.341    5.1     6       14.0        8.2
   46   3   0   3 31.725  63.45    0.341    5.1     6       14.0        8.2
   47   1   1   4 31.979  63.958   0.344    5.01   12       37.1      113.6
   48   2   0  -4 33.006  66.011   0.354    4.68    6        3.7        0.5
   49   2   0   4 33.006  66.011   0.354    4.68    6        3.7        0.5
   50   3   2   0 33.741  67.482   0.361    4.47   12       23.6       40.9
   51   4   0  -2 34.311  68.623   0.366    4.32    6        4.2        0.6
   52   4   0   2 34.311  68.623   0.366    4.32    6        4.2        0.6
   53   3   2  -1 34.634  69.268   0.369    4.23   12       17.7       21.7
   54   3   2   1 34.634  69.268   0.369    4.23   12       17.7       21.7
   55   2   2   3 34.77   69.54    0.37     4.2    12        4.8        1.6
   56   4   1   0 35.729  71.457   0.379    3.98   12        2.8        0.5
   57   3   1  -3 35.757  71.514   0.379    3.97   12       10.3        6.9
   58   3   1   3 35.757  71.514   0.379    3.97   12       10.3        6.9
   59   2   1  -4 35.997  71.993   0.382    3.92   12       50.0      161.0
   60   2   1   4 35.997  71.993   0.382    3.92   12       50.0      161.0
   61   4   1  -1 36.6    73.199   0.387    3.8    12        9.9        6.2
   62   4   1   1 36.6    73.199   0.387    3.8    12        9.9        6.2
   63   3   2  -2 37.255  74.509   0.393    3.67   12       38.7       90.4
   64   3   2   2 37.255  74.509   0.393    3.67   12       38.7       90.4
   65   3   0  -4 37.933  75.867   0.399    3.55    6       58.6      100.4
   66   3   0   4 37.933  75.867   0.399    3.55    6       58.6      100.4
   67   1   0  -5 37.961  75.922   0.399    3.55    6       21.0       12.9
   68   1   0   5 37.961  75.922   0.399    3.55    6       21.0       12.9
   69   4   0  -3 38.656  77.311   0.405    3.44    6       11.3        3.6
   70   4   0   3 38.656  77.311   0.405    3.44    6       11.3        3.6
   71   4   1  -2 39.169  78.338   0.41     3.37   12       41.4       94.8
   72   4   1   2 39.169  78.338   0.41     3.37   12       41.4       94.8
   73   5   0   0 39.579  79.157   0.414    3.31    6       31.6       27.3
   74   1   1   5 39.865  79.73    0.416    3.27   12        3.7        0.7
   75   5   0  -1 40.421  80.843   0.421    3.2     6        1.8        0.1
   76   5   0   1 40.421  80.843   0.421    3.2     6        1.8        0.1
   77   2   2   4 40.781  81.561   0.424    3.16   12       13.6        9.6
   78   2   0  -5 40.808  81.615   0.424    3.16    6       15.9        6.6
   79   2   0   5 40.808  81.615   0.424    3.16    6       15.9        6.6
   80   3   3   0 41.463  82.925   0.43     3.09    6       27.5       19.3
   81   3   2  -3 41.49   82.979   0.43     3.09   12        6.0        1.8
   82   3   2   3 41.49   82.979   0.43     3.09   12        6.0        1.8
   83   3   1  -4 41.719  83.438   0.432    3.06   12       46.3      107.9
   84   3   1   4 41.719  83.438   0.432    3.06   12       46.3      107.9
   85   3   3   1 42.298  84.595   0.437    3.01   12       14.1        9.9
   86   4   2   0 42.398  84.797   0.438    3.0    12       68.8      234.1
   87   5   0  -2 42.929  85.858   0.442    2.96    6       27.8       18.8
   88   5   0   2 42.929  85.858   0.442    2.96    6       27.8       18.8
   89   4   2  -1 43.231  86.462   0.445    2.94   12        8.6        3.6
   90   4   2   1 43.231  86.462   0.445    2.94   12        8.6        3.6
   91   4   1  -3 43.358  86.717   0.446    2.93   12       11.5        6.4
   92   4   1   3 43.358  86.717   0.446    2.93   12       11.5        6.4
   93   2   1  -5 43.613  87.226   0.448    2.91   12       10.9        5.7
   94   2   1   5 43.613  87.226   0.448    2.91   12       10.9        5.7
   95   4   0  -4 44.517  89.034   0.455    2.85    6       11.5        3.1
   96   4   0   4 44.517  89.034   0.455    2.85    6       11.5        3.1
   97   3   3   2 44.792  89.583   0.457    2.84   12       47.5      105.5


  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   0   7.321  14.642  6.04486     3028.5    100.0    100.0     5.6
    2   1   0   1  10.095  20.19   4.39455       31.5      1.0      1.0     5.6
    3   1   1   0  12.751  25.502  3.49         492.4     16.3     16.1     5.6
    4   1   1   1  14.56   29.12   3.06404       47.9      1.6      1.6     5.6
    5   2   0   0  14.765  29.53   3.02243     1623.2     53.6     53.0     5.6
    6   1   0   2  15.805  31.61   2.82816     1818.6     60.0     59.3     5.6
    7   2   0   1  16.37   32.741  2.73299      169.9      5.6      5.5     5.6
    8   1   1   2  19.061  38.123  2.35861      227.1      7.5      7.4     5.7
    9   2   0   2  20.522  41.043  2.19727      167.8      5.5      5.4     5.7
   10   2   1   1  20.976  41.952  2.15174      276.3      9.1      8.9     5.7
   11   0   0   3  21.166  42.332  2.13333      194.2      6.4      6.3     5.7
   12   3   0   0  22.475  44.95   2.01495      139.9      4.6      4.5     5.7
   13   1   0   3  22.513  45.026  2.01173       58.0      1.9      1.9     5.7
   14   3   0   1  23.627  47.254  1.92195      300.5      9.9      9.6     5.7
   15   2   1   2  24.472  48.945  1.85944      973.5     32.1     31.2     5.7
   16   2   2   0  26.195  52.389  1.745        212.7      7.0      6.8     5.8
   17   3   0   2  26.856  53.713  1.70509      613.7     20.3     19.6     5.8
   18   2   2   1  27.228  54.456  1.68354       42.9      1.4      1.4     5.8
   19   3   1   0  27.351  54.703  1.67654      111.3      3.7      3.5     5.8
   20   3   1   1  28.356  56.712  1.62182       55.8      1.8      1.8     5.8
   21   2   1   3  29.604  59.207  1.55928       53.7      1.8      1.7     5.8
   22   1   0   4  29.868  59.736  1.54674       96.4      3.2      3.0     5.8
   23   4   0   0  30.644  61.289  1.51121      185.1      6.1      5.8     5.8
   24   3   1   2  31.244  62.488  1.48507      302.9     10.0      9.5     5.8
   25   1   1   4  31.979  63.958  1.45444      113.6      3.8      3.6     5.9
   26   3   2   0  33.741  67.482  1.38679       40.9      1.4      1.3     5.9
   27   3   2   1  34.634  69.268  1.35533       43.5      1.4      1.4     5.9
   28   2   1   4  35.997  71.993  1.31059      322.0     10.6     10.0     5.9
   29   3   2   2  37.255  74.509  1.27244      180.8      6.0      5.6     6.0
   30   3   0   4  37.933  75.867  1.25301      226.6      7.5      7.0     6.0
   31   4   1   2  39.169  78.338  1.21954      189.6      6.3      5.8     6.0
   32   3   1   4  41.719  83.438  1.15748      215.9      7.1      6.5     6.1
   33   4   2   0  42.398  84.797  1.14237      234.1      7.7      7.0     6.1
   34   5   0   2  42.929  85.858  1.13095       37.6      1.2      1.1     6.1
   35   3   3   2  44.792  89.583  1.09333      105.5      3.5      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)