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       ***
                  ***********************
SCHNEEBERGITE

1, t-natrochalcite

(Bi,Ca)(Co,Ni,Fe)(2)[AsO(4)](2)(OH).H(2)O


Monoclinic  C 2/m  Z = 2

R =0.038          NR =585

31 .1 .1903

Ref.Str.:

         W. Krause, H.J. Bernhardt, H. Effenberger, T. Witzke (2002)

         * Eur. J. Mineral., 14, 115-126

Reserv:

         N.A.D.

                   Initial data from BDM-file 

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

             a =   9.005    alpha =   90.0 
             b =   6.211    beta  =  115.19
             c =   7.44     gamma =   90.0 

    Unit cell volume (cub. angs.) =   376.55

    Molar volume ( cub.cm/mol.) =   113.4 

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

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

   1 0.0     0.0     0.0      0.0    Bi    = 0.65, Ca    = 0.35
   2 0.25    0.25    0.5      0.0    Co    = 0.52, Ni    = 0.3 , Fe    = 0.18
   3 0.9142  0.5     0.2061   0.0    As    = 1.00
   4 0.3485  0.5     0.4138   0.0    O     = 1.00
   5 0.3186  0.0     0.3599   0.0    O     = 1.00
   6 0.0336  0.2799  0.2421   0.0    O     = 1.00
   7 0.2425  0.5     0.0198   0.0    O     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.0        0.0        0.0   
     2       2     0.25       0.25       0.5   
     3       3     0.9142     0.5        0.2061
     4       4     0.3485     0.5        0.4138
     5       5     0.3186     0.0        0.3599
     6       6     0.0336     0.2799     0.2421
     7       7     0.2425     0.5        0.0198
     8       2     0.75       0.75       0.5   
     9       3     0.0858     0.5        0.7939
    10       4     0.6515     0.5        0.5862
    11       5     0.6814     0.0        0.6401
    12       6     0.9664     0.7201     0.7579
    13       7     0.7575     0.5        0.9802
    14       2     0.25       0.75       0.5   
    15       6     0.0336     0.7201     0.2421
    16       2     0.75       0.25       0.5   
    17       6     0.9664     0.2799     0.7579
    18       1     0.5        0.5        0.0   
    19       3     0.4142     0.0        0.2061
    20       4     0.8485     0.0        0.4138
    21       5     0.8186     0.5        0.3599
    22       6     0.5336     0.2201     0.2421
    23       7     0.7425     0.0        0.0198
    24       3     0.5858     0.0        0.7939
    25       4     0.1515     0.0        0.5862
    26       5     0.1814     0.5        0.6401
    27       6     0.4664     0.7799     0.7579
    28       7     0.2575     0.0        0.9802
    29       6     0.5336     0.7799     0.2421
    30       6     0.4664     0.2201     0.7579


X-ray density (g/cm cub.)   =      5.09

MU (1/cm) =     704.593    Mass attenuation coefficient (cm**2/g) =    138.541

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

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

    1   Bi   ,Ca             3.072        8
                                                 2.9768       5
                                                 2.4278       6
                                                 2.9768       5
                                                 2.4278       6
                                                 2.4278       6
                                                 2.4278       6
                                                 2.3852       7
                                                 2.3852       7
    2   Co   ,Ni   ,Fe       2.592        6
                                                 2.0232       4
                                                 2.1041       5
                                                 2.081        6
                                                 2.0232       4
                                                 2.1041       5
                                                 2.081        6
    3    As                  2.46         4
                                                 1.6887       6
                                                 1.6722       7
                                                 1.6887       6
                                                 1.6998       5
    4    O                   3.264       11
                                                 3.1282       5
                                                 3.1282       5
                                                 2.9083       6
                                                 2.6687       7
                                                 2.472        4
                                                 2.9083       6
                                                 3.0406       6
                                                 2.6936       5
                                                 2.8965       6
                                                 3.0406       6
                                                 2.8965       6
    5    O                   3.264       11
                                                 3.1282       4
                                                 3.1282       4
                                                 2.909        6
                                                 3.0367       5
                                                 2.909        6
                                                 2.7982       6
                                                 2.6936       4
                                                 3.0089       6
                                                 2.6382       7
                                                 2.7982       6
                                                 3.0089       6
    6    O                   3.264        9
                                                 2.9083       4
                                                 2.909        5
                                                 2.7791       7
                                                 2.7341       6
                                                 3.0406       4
                                                 2.7982       5
                                                 2.9898       7
                                                 2.8965       4
                                                 3.0089       5
    7    O                   3.264        8
                                                 2.6687       4
                                                 2.7791       6
                                                 2.7791       6
                                                 2.9898       6
                                                 2.6382       5
                                                 3.1278       7
                                                 3.1278       7
                                                 2.9898       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   1  7.635  15.27    0.074  110.36    2       36.7      209.4
    2   1   1   0 10.432  20.865   0.101   58.09    4        2.7        1.2
    3   1   1  -1 11.245  22.49    0.109   49.7     4      138.5     2690.8
    4   2   0  -1 11.685  23.37    0.113   45.87    2      111.8      808.7
    5   2   0   0 12.682  25.364   0.123   38.63    2       67.1      245.6
    6   1   1   1 14.519  29.039   0.14    29.0     4       15.7       20.2
    7   2   0  -2 15.245  30.491   0.147   26.12    2      111.8      460.6
    8   0   0   2 15.409  30.819   0.149   25.53    2       84.6      258.0
    9   1   1  -2 16.278  32.556   0.157   22.68    4      225.3     3248.6
   10   0   2   0 16.74   33.479   0.161   21.34    2      156.1      733.4
   11   2   0   1 17.525  35.05    0.168   19.32    2      303.5     2509.0
   12   0   2   1 18.493  36.986   0.177   17.17    4      207.8     2092.2
   13   3   1  -1 19.332  38.664   0.185   15.57    4      205.1     1847.0
   14   2   2  -1 20.616  41.232   0.197   13.49    4      109.1      452.8
   15   3   1  -2 20.731  41.462   0.198   13.33    4      165.1     1024.6
   16   1   1   2 20.982  41.965   0.2     12.97    4      174.5     1114.4
   17   3   1   0 21.064  42.129   0.201   12.86    4      102.8      383.4
   18   2   2   0 21.232  42.465   0.202   12.63    4      153.2      836.6
   19   2   0  -3 21.352  42.705   0.204   12.47    2      125.2      275.8
   20   2   2  -2 22.955  45.909   0.218   10.6     4      140.7      591.4
   21   0   2   2 23.071  46.142   0.219   10.48    4        4.1        0.5
   22   1   1  -3 23.138  46.276   0.22    10.41    4      107.2      337.3
   23   0   0   3 23.489  46.978   0.223   10.06    2       24.9        8.8
   24   4   0  -1 23.639  47.278   0.224    9.91    2       11.7        1.9
   25   4   0  -2 23.895  47.79    0.226    9.68    2      138.9      263.3
   26   2   0   2 24.232  48.464   0.229    9.37    2       69.2       63.3
   27   2   2   1 24.626  49.252   0.233    9.03    4      144.1      529.5
   28   3   1  -3 24.828  49.656   0.235    8.87    4       49.4       61.0
   29   3   1   1 25.407  50.813   0.24     8.42    4       18.5        8.1
   30   4   0   0 26.045  52.089   0.245    7.95    2      147.1      242.6
   31   1   3   0 26.472  52.944   0.249    7.66    4       34.1       25.2
   32   4   0  -3 26.756  53.512   0.252    7.48    2      113.6      136.1
   33   1   3  -1 26.846  53.693   0.252    7.42    4      123.4      318.8
   34   2   2  -3 27.662  55.324   0.26     6.93    4        8.2        1.3
   35   1   3   1 28.574  57.149   0.267    6.44    4       13.1        3.1
   36   1   1   3 28.583  57.165   0.267    6.44    4      192.8      675.0
   37   2   0  -4 28.747  57.493   0.269    6.36    2      150.5      203.0
   38   0   2   3 29.456  58.911   0.275    6.02    4      135.8      312.8
   39   4   2  -1 29.584  59.168   0.276    5.96    4      101.3      172.4
   40   1   3  -2 29.634  59.267   0.276    5.93    4      166.4      463.5
   41   4   2  -2 29.803  59.607   0.278    5.86    4       23.6        9.2
   42   2   2   2 30.094  60.187   0.28     5.73    4      156.9      398.1
   43   4   0   1 30.663  61.327   0.285    5.5     2       65.8       33.6
   44   3   1  -4 30.829  61.658   0.286    5.43    4       12.6        2.4
   45   1   1  -4 31.019  62.037   0.288    5.36    4       16.5        4.1
   46   5   1  -2 31.205  62.41    0.29     5.29    4       32.8       16.0
   47   3   1   2 31.581  63.163   0.293    5.15    4       23.1        7.7
   48   3   3  -1 31.661  63.321   0.293    5.12    4      193.0      538.6
   49   4   2   0 31.676  63.352   0.294    5.12    4       52.5       39.7
   50   4   0  -4 31.729  63.459   0.294    5.1     2      244.9      431.5
   51   5   1  -1 31.791  63.583   0.294    5.08    4      149.1      318.4
   52   2   0   3 32.046  64.093   0.297    4.99    2       80.5       45.6
   53   0   0   4 32.102  64.204   0.297    4.97    2      225.1      355.4
   54   4   2  -3 32.306  64.613   0.299    4.9     4      304.3     1281.3
   55   3   3  -2 32.659  65.319   0.302    4.79    4      124.9      210.7
   56   1   3   2 32.843  65.687   0.303    4.73    4      125.6      210.8
   57   5   1  -3 32.873  65.747   0.303    4.72    4        0.8        0.0
   58   3   3   0 32.904  65.807   0.304    4.71    4      109.8      160.2
   59   2   2  -4 34.097  68.193   0.313    4.37    4      230.6      655.8
   60   1   3  -3 34.47   68.939   0.316    4.28    4       90.0       97.7
   61   5   1   0 34.57   69.141   0.317    4.25    4      149.3      267.2
   62   0   4   0 35.173  70.346   0.322    4.1     2      312.0      563.5
   63   3   3  -3 35.803  71.607   0.327    3.96    4       26.3        7.7
   64   4   2   1 35.853  71.706   0.327    3.95    4      241.7      651.2
   65   0   4   1 36.24   72.48    0.33     3.87    4       36.3       14.4
   66   3   3   1 36.271  72.541   0.331    3.86    4        3.6        0.1
   67   6   0  -2 36.595  73.19    0.333    3.8     2       82.2       36.2
   68   5   1  -4 36.637  73.274   0.334    3.79    4       72.2       55.7
   69   4   2  -4 36.842  73.684   0.335    3.75    4       65.9       45.9
   70   4   0   2 37.031  74.062   0.337    3.71    2      241.1      304.5
   71   2   2   3 37.138  74.276   0.337    3.69    4       73.3       55.9
   72   1   1   4 37.16   74.32    0.338    3.69    4       79.0       64.9
   73   2   0  -5 37.188  74.376   0.338    3.69    2      182.3      172.8
   74   0   2   4 37.19   74.381   0.338    3.68    4       22.5        5.3
   75   6   0  -3 37.416  74.832   0.34     3.64    2      185.0      175.9
   76   2   4  -1 37.634  75.268   0.341    3.61    4       79.7       64.6
   77   6   0  -1 37.875  75.751   0.343    3.56    2      130.1       85.0
   78   2   4   0 38.058  76.117   0.345    3.53    4       50.4       25.4
   79   3   1  -5 38.307  76.614   0.347    3.49    4      104.3      107.2
   80   4   0  -5 38.397  76.795   0.347    3.48    2       26.1        3.3
   81   1   3   3 38.928  77.855   0.351    3.4     4      173.0      287.1
   82   3   1   3 39.218  78.436   0.353    3.36    4      149.1      210.6
   83   2   4  -2 39.289  78.577   0.354    3.35    4       62.7       37.1
   84   5   1   1 39.33   78.66    0.354    3.34    4       78.0       57.3
   85   0   4   2 39.374  78.748   0.355    3.34    4       73.7       51.2
   86   1   1  -5 39.931  79.863   0.359    3.26    4        0.7        0.0
   87   6   0  -4 40.295  80.589   0.362    3.22    2       57.3       14.9
   88   2   4   1 40.542  81.084   0.363    3.19    4      230.7      479.0
   89   3   3  -4 40.892  81.784   0.366    3.15    4       25.0        5.5
   90   2   0   4 40.972  81.944   0.367    3.14    2       10.5        0.5
   91   1   3  -4 41.061  82.122   0.367    3.13    4       33.0        9.6
   92   6   0   0 41.194  82.388   0.368    3.12    2       45.1        9.0
   93   5   3  -2 41.227  82.455   0.368    3.11    4       23.6        4.9
   94   6   2  -2 41.459  82.918   0.37     3.09    4      216.0      406.6
   95   3   3   2 41.565  83.129   0.371    3.08    4        7.2        0.5
   96   0   0   5 41.628  83.256   0.371    3.07    2      133.3       77.0
   97   5   3  -1 41.754  83.507   0.372    3.06    4      151.7      198.7
   98   4   2   2 41.88   83.761   0.373    3.05    4      140.2      169.0
   99   2   2  -5 42.032  84.064   0.374    3.04    4       17.0        2.5
  100   6   2  -3 42.253  84.506   0.376    3.02    4      101.8       88.2
  101   5   1  -5 42.297  84.594   0.376    3.01    4      155.7      205.9
  102   6   2  -1 42.699  85.399   0.379    2.98    4       47.5       19.0
  103   5   3  -3 42.736  85.472   0.379    2.97    4       16.4        2.3
  104   2   4  -3 42.959  85.918   0.381    2.96    4      117.1      114.4
  105   4   2  -5 43.208  86.415   0.383    2.94    4       55.0       25.1
  106   5   3   0 44.306  88.611   0.39     2.87    4      146.3      173.0
  107   0   4   3 44.467  88.933   0.392    2.86    4       18.6        2.8
  108   4   4  -1 44.577  89.153   0.392    2.85    4        7.6        0.5
  109   4   4  -2 44.766  89.531   0.394    2.84    4      120.4      116.1


  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   1   7.635  15.27   6.73247      209.4      6.4      6.5     5.6
    2   1   1  -1  11.245  22.49   4.58694     2690.8     82.8     83.5     5.6
    3   2   0  -1  11.685  23.37   4.4164       808.7     24.9     25.1     5.6
    4   2   0   0  12.682  25.364  4.07432      245.6      7.6      7.6     5.6
    5   2   0  -2  15.245  30.491  3.4016       460.6     14.2     14.2     5.6
    6   0   0   2  15.409  30.819  3.36623      258.0      7.9      8.0     5.6
    7   1   1  -2  16.278  32.556  3.19114     3248.6    100.0    100.0     5.6
    8   0   2   0  16.74   33.479  3.1055       733.4     22.6     22.6     5.7
    9   2   0   1  17.525  35.05   2.97041     2509.0     77.2     77.1     5.7
   10   0   2   1  18.493  36.986  2.81995     2092.2     64.4     64.1     5.7
   11   3   1  -1  19.332  38.664  2.70194     1847.0     56.9     56.5     5.7
   12   2   2  -1  20.616  41.232  2.54033      452.8     13.9     13.8     5.7
   13   3   1  -2  20.731  41.462  2.52688     1024.6     31.5     31.3     5.7
   14   1   1   2  20.982  41.965  2.49793     1114.4     34.3     34.0     5.7
   15   3   1   0  21.064  42.129  2.48864      383.4     11.8     11.7     5.7
   16   2   2   0  21.232  42.465  2.46985      836.6     25.8     25.5     5.7
   17   2   0  -3  21.352  42.705  2.4566       275.8      8.5      8.4     5.7
   18   2   2  -2  22.955  45.909  2.29347      591.4     18.2     18.0     5.7
   19   1   1  -3  23.138  46.276  2.27629      337.3     10.4     10.2     5.7
   20   4   0  -2  23.895  47.79   2.2082       263.3      8.1      8.0     5.7
   21   2   0   2  24.232  48.464  2.17929       63.3      1.9      1.9     5.7
   22   2   2   1  24.626  49.252  2.14656      529.5     16.3     16.0     5.7
   23   3   1  -3  24.828  49.656  2.13019       61.0      1.9      1.8     5.7
   24   4   0   0  26.045  52.089  2.03716      242.6      7.5      7.3     5.8
   25   4   0  -3  26.756  53.512  1.98683      136.1      4.2      4.1     5.8
   26   1   3  -1  26.846  53.693  1.98065      318.8      9.8      9.6     5.8
   27   1   1   3  28.583  57.165  1.86959      678.1     20.9     20.3     5.8
   28   2   0  -4  28.747  57.493  1.85982      203.0      6.2      6.1     5.8
   29   0   2   3  29.456  58.911  1.81893      312.8      9.6      9.3     5.8
   30   4   2  -1  29.584  59.168  1.81176      172.4      5.3      5.1     5.8
   31   1   3  -2  29.634  59.267  1.809        463.5     14.3     13.8     5.8
   32   2   2   2  30.094  60.187  1.78388      398.1     12.3     11.9     5.8
   33   4   0   1  30.663  61.327  1.75387       33.6      1.0      1.0     5.8
   34   3   3  -1  31.661  63.321  1.7041       578.3     17.8     17.2     5.9
   35   4   0  -4  31.729  63.459  1.7008       431.5     13.3     12.8     5.9
   36   5   1  -1  31.791  63.583  1.69783      318.4      9.8      9.4     5.9
   37   2   0   3  32.046  64.093  1.68574       45.6      1.4      1.4     5.9
   38   0   0   4  32.102  64.204  1.68312      355.4     10.9     10.5     5.9
   39   4   2  -3  32.306  64.613  1.67362     1281.3     39.4     38.0     5.9
   40   3   3  -2  32.659  65.319  1.6575       210.7      6.5      6.2     5.9
   41   1   3   2  32.843  65.687  1.64925      210.8      6.5      6.2     5.9
   42   3   3   0  32.904  65.807  1.64656      160.2      4.9      4.7     5.9
   43   2   2  -4  34.097  68.193  1.59557      655.8     20.2     19.3     5.9
   44   1   3  -3  34.47   68.939  1.5804        97.7      3.0      2.9     5.9
   45   5   1   0  34.57   69.141  1.57636      267.2      8.2      7.9     5.9
   46   0   4   0  35.173  70.346  1.55275      563.5     17.3     16.5     5.9
   47   4   2   1  35.853  71.706  1.52715      651.2     20.0     19.1     5.9
   48   6   0  -2  36.595  73.19   1.50038       36.2      1.1      1.1     6.0
   49   5   1  -4  36.637  73.274  1.4989        55.7      1.7      1.6     6.0
   50   4   2  -4  36.842  73.684  1.49173       45.9      1.4      1.3     6.0
   51   4   0   2  37.031  74.062  1.4852       304.5      9.4      8.9     6.0
   52   2   0  -5  37.188  74.376  1.47984      299.0      9.2      8.7     6.0
   53   6   0  -3  37.416  74.832  1.47213      175.9      5.4      5.1     6.0
   54   2   4  -1  37.634  75.268  1.46485       64.6      2.0      1.9     6.0
   55   6   0  -1  37.875  75.751  1.4569        85.0      2.6      2.5     6.0
   56   3   1  -5  38.307  76.614  1.44296      107.2      3.3      3.1     6.0
   57   1   3   3  38.928  77.855  1.42353      287.1      8.8      8.3     6.0
   58   3   1   3  39.218  78.436  1.41467      210.6      6.5      6.1     6.0
   59   2   4  -2  39.289  78.577  1.41254       37.1      1.1      1.1     6.0
   60   5   1   1  39.33   78.66   1.41129       57.3      1.8      1.7     6.0
   61   0   4   2  39.374  78.748  1.40998       51.2      1.6      1.5     6.0
   62   2   4   1  40.542  81.084  1.37608      479.0     14.7     13.7     6.1
   63   6   2  -2  41.459  82.918  1.35097      406.6     12.5     11.6     6.1
   64   0   0   5  41.628  83.256  1.34649       77.0      2.4      2.2     6.1
   65   5   3  -1  41.754  83.507  1.34318      198.7      6.1      5.7     6.1
   66   4   2   2  41.88   83.761  1.33986      169.0      5.2      4.8     6.1
   67   6   2  -3  42.253  84.506  1.33024       88.2      2.7      2.5     6.1
   68   5   1  -5  42.297  84.594  1.32912      205.9      6.3      5.9     6.1
   69   2   4  -3  42.959  85.918  1.31254      114.4      3.5      3.2     6.1
   70   5   3   0  44.306  88.611  1.28057      173.0      5.3      4.9     6.2
   71   4   4  -2  44.766  89.531  1.27017      116.1      3.6      3.3     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)