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       ***
                  ***********************
LANGBEINITE

22, analogue

[NH(4)](2)Mn(2)[SO(4)](3)


Cubic  P 2(1)3  Z = 4

R =0.03          NR =765

9 .6 .1905

Ref.Str.:

         H. Zhang, L. Fang and R.-Z. Yuan (2005)

         * Acta Cryst., E61, i73-i75

Reserv:

         See U(ij) in the original. N.A.D.

                   Initial data from BDM-file 

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

             a =  10.188    alpha =   90.0 
             b =  10.188    beta  =   90.0 
             c =  10.188    gamma =   90.0 

    Unit cell volume (cub. angs.) =  1057.47

    Molar volume ( cub.cm/mol.) =   159.24

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

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

   1 0.9167  0.4167  0.0833   0.0    Mn    = 1.00
   2 0.8438  0.8438  0.8438   0.0    Mn    = 1.00
   3 0.8748  0.5311  0.7632   0.0    S     = 1.00
   4 0.9191  0.6682  0.751    0.0    O     = 1.00
   5 0.8463  0.4993  0.9015   0.0    O     = 1.00
   6 0.977   0.4445  0.7117   0.0    O     = 1.00
   7 0.7545  0.5095  0.6872   0.0    O     = 1.00
   8 0.201   0.701   0.799    0.0    N     = 1.00
   9 0.5665  0.4335  0.9335   0.0    N     = 1.00
  10 0.211   0.755   0.835    0.0    H     = 1.00
  11 0.1528  0.6528  0.8472   0.0    H     = 1.00
  12 0.6415  0.469   0.925    0.0    H     = 1.00
  13 0.5182  0.4818  0.9818   0.0    H     = 1.00


  Co-ordinates for all atomic positions :

   No       NoP      x/a        y/b       z/c 

     1       1     0.9167     0.4167     0.0833
     2       2     0.8438     0.8438     0.8438
     3       3     0.8748     0.5311     0.7632
     4       4     0.9191     0.6682     0.751 
     5       5     0.8463     0.4993     0.9015
     6       6     0.977      0.4445     0.7117
     7       7     0.7545     0.5095     0.6872
     8       8     0.201      0.701      0.799 
     9       9     0.5665     0.4335     0.9335
    10      10     0.211      0.755      0.835 
    11      11     0.1528     0.6528     0.8472
    12      12     0.6415     0.469      0.925 
    13      13     0.5182     0.4818     0.9818
    14       1     0.5833     0.5833     0.5833
    15       2     0.6562     0.1562     0.3438
    16       3     0.6252     0.4689     0.2632
    17       4     0.5809     0.3318     0.251 
    18       5     0.6537     0.5007     0.4015
    19       6     0.523      0.5555     0.2117
    20       7     0.7455     0.4905     0.1872
    21       8     0.299      0.299      0.299 
    22       9     0.9335     0.5665     0.4335
    23      10     0.289      0.245      0.335 
    24      11     0.3472     0.3472     0.3472
    25      12     0.8585     0.531      0.425 
    26      13     0.9818     0.5182     0.4818
    27       1     0.0833     0.9167     0.4167
    28       2     0.1562     0.3438     0.6562
    29       3     0.1252     0.0311     0.7368
    30       4     0.0809     0.1682     0.749 
    31       5     0.1537     0.9993     0.5985
    32       6     0.023      0.9445     0.7883
    33       7     0.2455     0.0095     0.8128
    34       8     0.799      0.201      0.701 
    35       9     0.4335     0.9335     0.5665
    36      10     0.789      0.255      0.665 
    37      11     0.8472     0.1528     0.6528
    38      12     0.3585     0.969      0.575 
    39      13     0.4818     0.9818     0.5182
    40       1     0.4167     0.0833     0.9167
    41       2     0.3438     0.6562     0.1562
    42       3     0.3748     0.9689     0.2368
    43       4     0.4191     0.8318     0.249 
    44       5     0.3463     0.0007     0.0985
    45       6     0.477      0.0555     0.2883
    46       7     0.2545     0.9905     0.3128
    47       8     0.701      0.799      0.201 
    48       9     0.0665     0.0665     0.0665
    49      10     0.711      0.745      0.165 
    50      11     0.6528     0.8472     0.1528
    51      12     0.1415     0.031      0.075 
    52      13     0.0182     0.0182     0.0182
    53       3     0.5311     0.7632     0.8748
    54       3     0.7632     0.8748     0.5311
    55       4     0.6682     0.751      0.9191
    56       4     0.751      0.9191     0.6682
    57       5     0.4993     0.9015     0.8463
    58       5     0.9015     0.8463     0.4993
    59       6     0.4445     0.7117     0.977 
    60       6     0.7117     0.977      0.4445
    61       7     0.5095     0.6872     0.7545
    62       7     0.6872     0.7545     0.5095
    63      10     0.755      0.835      0.211 
    64      10     0.835      0.211      0.755 
    65      12     0.469      0.925      0.6415
    66      12     0.925      0.6415     0.469 
    67       3     0.4689     0.2632     0.6252
    68       3     0.2632     0.6252     0.4689
    69       4     0.3318     0.251      0.5809
    70       4     0.251      0.5809     0.3318
    71       5     0.5007     0.4015     0.6537
    72       5     0.4015     0.6537     0.5007
    73       6     0.5555     0.2117     0.523 
    74       6     0.2117     0.523      0.5555
    75       7     0.4905     0.1872     0.7455
    76       7     0.1872     0.7455     0.4905
    77      10     0.245      0.335      0.289 
    78      10     0.335      0.289      0.245 
    79      12     0.531      0.425      0.8585
    80      12     0.425      0.8585     0.531 
    81       3     0.0311     0.7368     0.1252
    82       3     0.7368     0.1252     0.0311
    83       4     0.1682     0.749      0.0809
    84       4     0.749      0.0809     0.1682
    85       5     0.9993     0.5985     0.1537
    86       5     0.5985     0.1537     0.9993
    87       6     0.9445     0.7883     0.023 
    88       6     0.7883     0.023      0.9445
    89       7     0.0095     0.8128     0.2455
    90       7     0.8128     0.2455     0.0095
    91      10     0.255      0.665      0.789 
    92      10     0.665      0.789      0.255 
    93      12     0.969      0.575      0.3585
    94      12     0.575      0.3585     0.969 
    95       3     0.9689     0.2368     0.3748
    96       3     0.2368     0.3748     0.9689
    97       4     0.8318     0.249      0.4191
    98       4     0.249      0.4191     0.8318
    99       5     0.0007     0.0985     0.3463
   100       5     0.0985     0.3463     0.0007
   101       6     0.0555     0.2883     0.477 
   102       6     0.2883     0.477      0.0555
   103       7     0.9905     0.3128     0.2545
   104       7     0.3128     0.2545     0.9905
   105      10     0.745      0.165      0.711 
   106      10     0.165      0.711      0.745 
   107      12     0.031      0.075      0.1415
   108      12     0.075      0.1415     0.031 


X-ray density (g/cm cub.)   =      2.73

MU (1/cm) =     105.656    Mass attenuation coefficient (cm**2/g) =     38.76 

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

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

    1    Mn                  2.724        6
                                                 2.1571       5
                                                 2.1744       7
                                                 2.1571       5
                                                 2.1744       7
                                                 2.1571       5
                                                 2.1744       7
    2    Mn                  2.724        6
                                                 2.164        4
                                                 2.1692       6
                                                 2.164        4
                                                 2.164        4
                                                 2.1692       6
                                                 2.1692       6
    3    S                   1.98         4
                                                 1.4733       4
                                                 1.4746       5
                                                 1.4617       6
                                                 1.4665       7
    4    O                   3.264       13
                                                 2.4212       5
                                                 2.388        6
                                                 2.4184       7
                                                 3.2184      10
                                                 2.5795      11
                                                 3.204       13
                                                 3.0313       6
                                                 3.1904       4
                                                 3.1904       4
                                                 3.1465       5
                                                 2.8865      12
                                                 3.0403       6
                                                 2.5436      10
    5    O                   3.264       10
                                                 2.4212       4
                                                 2.4133       6
                                                 2.3774       7
                                                 2.1228      12
                                                 3.0879       7
                                                 3.1465       4
                                                 3.1707       5
                                                 2.8307       7
                                                 3.1891      12
                                                 3.1707       5
    6    O                   3.264       12
                                                 2.388        4
                                                 2.4133       5
                                                 2.3747       7
                                                 3.1012      11
                                                 2.4601      13
                                                 3.0313       4
                                                 2.7608      10
                                                 2.819       10
                                                 3.2284      12
                                                 2.9815       6
                                                 3.0403       4
                                                 2.9815       6
    7    O                   3.264       14
                                                 2.4184       4
                                                 2.3774       5
                                                 2.3747       6
                                                 2.7139      12
                                                 3.0879       5
                                                 2.8821      12
                                                 3.1224      13
                                                 2.6263      10
                                                 3.1588       7
                                                 3.1588       7
                                                 3.2246      10
                                                 3.1253      12
                                                 2.8307       5
                                                 2.9953      12
    8    N                   1.992        4
                                                 0.669       10
                                                 0.8505      11
                                                 0.669       10
                                                 0.669       10
    9    N                   1.992        4
                                                 0.8498      12
                                                 0.8523      13
                                                 0.8498      12
                                                 0.8498      12
   10    H                   3.264        9
                                                 3.2184       4
                                                 1.2046      11
                                                 2.7608       6
                                                 2.6263       7
                                                 2.819        6
                                                 3.2246       7
                                                 2.5436       4
                                                 1.1231      10
                                                 1.1231      10
   11    H                   3.264        9
                                                 2.5795       4
                                                 3.1012       6
                                                 1.2046      10
                                                 2.5795       4
                                                 3.1012       6
                                                 1.2046      10
                                                 2.5795       4
                                                 3.1012       6
                                                 1.2046      10
   12    H                   3.264       11
                                                 2.1228       5
                                                 2.7139       7
                                                 1.3892      13
                                                 2.8821       7
                                                 2.8865       4
                                                 3.2284       6
                                                 3.1253       7
                                                 3.1891       5
                                                 1.3883      12
                                                 2.9953       7
                                                 1.3883      12
   13    H                   3.264       12
                                                 1.3892      12
                                                 3.204        4
                                                 2.4601       6
                                                 3.1224       7
                                                 3.204        4
                                                 2.4601       6
                                                 3.1224       7
                                                 1.3892      12
                                                 1.3892      12
                                                 3.204        4
                                                 2.4601       6
                                                 3.1224       7

  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   0  7.132  14.265   0.069  126.78   12        3.2        1.4
    2   1   1   1  8.747  17.493   0.085   83.55    8      103.3      637.8
    3   2   0   0 10.113  20.226   0.098   61.95    6        5.3        0.9
    4   1   2   0 11.322  22.643   0.11    49.0    12       84.6      376.6
    5   2   1   0 11.322  22.643   0.11    49.0    12       25.5       34.3
    6   1   1   2 12.419  24.837   0.12    40.37   24       64.3      358.6
    7   2   2   0 14.378  28.757   0.139   29.61   12       38.2       46.5
    8   2   2   1 15.271  30.542   0.147   26.03   24       60.2      202.4
    9   1   3   0 16.119  32.238   0.155   23.17   12      193.1      926.9
   10   3   1   0 16.119  32.238   0.155   23.17   12      184.6      847.6
   11   1   1   3 16.929  33.858   0.163   20.83   24       68.1      207.2
   12   2   2   2 17.706  35.412   0.17    18.89    8       16.4        3.7
   13   2   3   0 18.454  36.909   0.177   17.25   12       42.9       34.1
   14   3   2   0 18.454  36.909   0.177   17.25   12       59.0       64.5
   15   1   2   3 19.178  38.356   0.184   15.84   24      102.7      358.5
   16   3   2   1 19.178  38.356   0.184   15.84   24      130.0      574.6
   17   4   0   0 20.56   41.119   0.196   13.57    6       13.0        1.2
   18   1   4   0 21.222  42.445   0.202   12.64   12       21.4        6.2
   19   2   2   3 21.222  42.445   0.202   12.64   24       39.8       42.9
   20   4   1   0 21.222  42.445   0.202   12.64   12        2.3        0.1
   21   1   1   4 21.869  43.738   0.208   11.82   24       13.1        4.3
   22   3   3   0 21.869  43.738   0.208   11.82   12       22.1        6.2
   23   3   3   1 22.5    45.001   0.214   11.09   24       36.9       32.4
   24   2   4   0 23.118  46.237   0.219   10.43   12        0.7        0.0
   25   4   2   0 23.118  46.237   0.219   10.43   12       21.6        5.2
   26   1   2   4 23.724  47.448   0.225    9.83   24       38.0       30.4
   27   4   2   1 23.724  47.448   0.225    9.83   24       33.3       23.4
   28   3   3   2 24.318  48.636   0.23     9.3    24       32.7       21.3
   29   2   2   4 25.474  50.949   0.24     8.36   24      107.1      206.0
   30   3   4   0 26.039  52.077   0.245    7.96   12       46.6       18.5
   31   4   3   0 26.039  52.077   0.245    7.96   12       96.8       80.0
   32   1   3   4 26.594  53.189   0.25     7.58   24       67.0       73.0
   33   1   5   0 26.594  53.189   0.25     7.58   12       11.2        1.0
   34   4   3   1 26.594  53.189   0.25     7.58   24       76.3       94.7
   35   5   1   0 26.594  53.189   0.25     7.58   12       17.2        2.4
   36   1   1   5 27.142  54.284   0.255    7.24   24       53.4       44.4
   37   3   3   3 27.142  54.284   0.255    7.24    8      106.0       58.2
   38   2   3   4 28.216  56.431   0.264    6.63   24       38.5       21.1
   39   2   5   0 28.216  56.431   0.264    6.63   12      131.3      122.7
   40   4   3   2 28.216  56.431   0.264    6.63   24       95.2      129.0
   41   5   2   0 28.216  56.431   0.264    6.63   12       26.7        5.1
   42   1   2   5 28.743  57.485   0.269    6.36   24       56.4       43.4
   43   5   2   1 28.743  57.485   0.269    6.36   24       43.3       25.6
   44   4   4   0 29.778  59.557   0.278    5.87   12       15.4        1.5
   45   2   2   5 30.288  60.576   0.282    5.65   24       74.0       66.4
   46   4   4   1 30.288  60.576   0.282    5.65   24      112.8      154.4
   47   3   3   4 30.793  61.585   0.286    5.45   24       15.1        2.7
   48   3   5   0 30.793  61.585   0.286    5.45   12       96.3       54.3
   49   5   3   0 30.793  61.585   0.286    5.45   12       55.1       17.8
   50   1   3   5 31.292  62.585   0.29     5.26   24        7.3        0.6
   51   5   3   1 31.292  62.585   0.29     5.26   24       20.5        4.7
   52   4   4   2 31.788  63.575   0.294    5.08   24        9.8        1.1
   53   6   0   0 31.788  63.575   0.294    5.08    6       15.2        0.6
   54   1   6   0 32.279  64.558   0.299    4.91   12       30.7        5.0
   55   6   1   0 32.279  64.558   0.299    4.91   12       72.6       27.8
   56   1   1   6 32.766  65.532   0.303    4.76   24      112.1      128.4
   57   2   3   5 32.766  65.532   0.303    4.76   24       86.0       75.5
   58   5   3   2 32.766  65.532   0.303    4.76   24       83.0       70.3
   59   2   6   0 33.729  67.458   0.31     4.47   12       84.6       34.4
   60   6   2   0 33.729  67.458   0.31     4.47   12       90.8       39.5
   61   1   2   6 34.206  68.411   0.314    4.34   24       36.5       12.5
   62   4   4   3 34.206  68.411   0.314    4.34   24       34.4       11.0
   63   4   5   0 34.206  68.411   0.314    4.34   12       26.8        3.3
   64   5   4   0 34.206  68.411   0.314    4.34   12       32.2        4.8
   65   6   2   1 34.206  68.411   0.314    4.34   24       73.3       50.1
   66   1   4   5 34.679  69.358   0.318    4.22   24       70.5       45.0
   67   5   4   1 34.679  69.358   0.318    4.22   24       39.8       14.3
   68   3   3   5 35.15   70.299   0.322    4.11   24       50.4       22.4
   69   2   2   6 35.617  71.235   0.326    4.0    24       38.4       12.7
   70   2   4   5 36.083  72.165   0.329    3.9    24       58.8       28.9
   71   3   6   0 36.083  72.165   0.329    3.9    12       97.0       39.4
   72   5   4   2 36.083  72.165   0.329    3.9    24       58.3       28.5
   73   6   3   0 36.083  72.165   0.329    3.9    12       21.3        1.9
   74   1   3   6 36.545  73.091   0.333    3.81   24       61.8       31.2
   75   6   3   1 36.545  73.091   0.333    3.81   24      109.5       98.0
   76   4   4   4 37.464  74.928   0.34     3.64    8       83.4       18.1
   77   2   3   6 37.921  75.841   0.344    3.56   24       53.3       21.7
   78   6   3   2 37.921  75.841   0.344    3.56   24       86.9       57.7
   79   1   7   0 38.375  76.75    0.347    3.48   12       44.3        7.4
   80   3   4   5 38.375  76.75    0.347    3.48   24       61.3       28.0
   81   5   4   3 38.375  76.75    0.347    3.48   24       48.2       17.4
   82   5   5   0 38.375  76.75    0.347    3.48   12       21.0        1.6
   83   7   1   0 38.375  76.75    0.347    3.48   12       27.7        2.9
   84   1   1   7 38.828  77.656   0.35     3.41   24       32.4        7.7
   85   5   5   1 38.828  77.656   0.35     3.41   24       32.7        7.8
   86   4   6   0 39.279  78.559   0.354    3.35   12       64.5       15.0
   87   6   4   0 39.279  78.559   0.354    3.35   12       65.9       15.6
   88   1   4   6 39.729  79.459   0.357    3.29   24       66.7       31.4
   89   2   7   0 39.729  79.459   0.357    3.29   12      120.7       51.4
   90   6   4   1 39.729  79.459   0.357    3.29   24       15.0        1.6
   91   7   2   0 39.729  79.459   0.357    3.29   12        9.6        0.3
   92   1   2   7 40.178  80.356   0.361    3.23   24       37.8        9.9
   93   3   3   6 40.178  80.356   0.361    3.23   24       11.2        0.9
   94   5   5   2 40.178  80.356   0.361    3.23   24       61.2       26.0
   95   7   2   1 40.178  80.356   0.361    3.23   24       69.4       33.4
   96   2   4   6 41.072  82.143   0.367    3.13   24       40.3       10.9
   97   6   4   2 41.072  82.143   0.367    3.13   24       81.5       44.6
   98   2   2   7 41.517  83.034   0.371    3.08   24       69.3       31.8
   99   4   4   5 41.517  83.034   0.371    3.08   24       37.9        9.5
  100   3   7   0 41.961  83.923   0.374    3.04   12       48.8        7.8
  101   7   3   0 41.961  83.923   0.374    3.04   12        1.1        0.0
  102   1   3   7 42.405  84.81    0.377    3.0    24       24.1        3.7
  103   5   5   3 42.405  84.81    0.377    3.0    24       37.8        9.2
  104   7   3   1 42.405  84.81    0.377    3.0    24       93.4       56.2
  105   3   4   6 43.291  86.582   0.383    2.93   24       43.7       12.0
  106   5   6   0 43.291  86.582   0.383    2.93   12        3.6        0.0
  107   6   4   3 43.291  86.582   0.383    2.93   24       51.1       16.4
  108   6   5   0 43.291  86.582   0.383    2.93   12       55.4        9.7
  109   1   5   6 43.733  87.467   0.386    2.9    24       66.2       27.3
  110   2   3   7 43.733  87.467   0.386    2.9    24       11.5        0.8
  111   6   5   1 43.733  87.467   0.386    2.9    24       23.1        3.3
  112   7   3   2 43.733  87.467   0.386    2.9    24       26.6        4.4
  113   8   0   0 44.617  89.234   0.393    2.85    6       28.5        1.2


  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   1   1   1   8.747  17.493  5.88204      637.8     35.9     36.3     5.6
    2   1   2   0  11.322  22.643  4.55621      410.8     23.2     23.3     5.6
    3   1   1   2  12.419  24.837  4.15923      358.6     20.2     20.3     5.6
    4   2   2   0  14.378  28.757  3.602         46.5      2.6      2.6     5.6
    5   2   2   1  15.271  30.542  3.396        202.4     11.4     11.4     5.6
    6   1   3   0  16.119  32.238  3.22173     1774.5    100.0    100.0     5.6
    7   1   1   3  16.929  33.858  3.0718       207.2     11.7     11.7     5.7
    8   3   2   0  18.454  36.909  2.82564       98.6      5.6      5.5     5.7
    9   3   2   1  19.178  38.356  2.72286      933.1     52.6     52.3     5.7
   10   2   2   3  21.222  42.445  2.47095       49.2      2.8      2.7     5.7
   11   3   3   1  22.5    45.001  2.33729       32.4      1.8      1.8     5.7
   12   1   2   4  23.724  47.448  2.2232        53.8      3.0      3.0     5.7
   13   3   3   2  24.318  48.636  2.17209       21.3      1.2      1.2     5.7
   14   2   2   4  25.474  50.949  2.07962      206.0     11.6     11.4     5.8
   15   4   3   0  26.039  52.077  2.0376        98.5      5.6      5.4     5.8
   16   4   3   1  26.594  53.189  1.99803      171.1      9.6      9.4     5.8
   17   3   3   3  27.142  54.284  1.96068      102.6      5.8      5.6     5.8
   18   4   3   2  28.216  56.431  1.89186      277.8     15.7     15.2     5.8
   19   1   2   5  28.743  57.485  1.86007       68.9      3.9      3.8     5.8
   20   4   4   1  30.288  60.576  1.7735       220.9     12.4     12.1     5.8
   21   5   3   0  30.793  61.585  1.74723       74.7      4.2      4.1     5.8
   22   6   1   0  32.279  64.558  1.6749        32.8      1.8      1.8     5.9
   23   1   1   6  32.766  65.532  1.65271      274.2     15.5     14.8     5.9
   24   6   2   0  33.729  67.458  1.61086       73.9      4.2      4.0     5.9
   25   6   2   1  34.206  68.411  1.5911        81.8      4.6      4.4     5.9
   26   1   4   5  34.679  69.358  1.57204       59.3      3.3      3.2     5.9
   27   3   3   5  35.15   70.299  1.55366       22.4      1.3      1.2     5.9
   28   3   6   0  36.083  72.165  1.51874       98.7      5.6      5.3     5.9
   29   6   3   1  36.545  73.091  1.50214      129.1      7.3      6.9     6.0
   30   4   4   4  37.464  74.928  1.47051       18.1      1.0      1.0     6.0
   31   6   3   2  37.921  75.841  1.45543       79.4      4.5      4.2     6.0
   32   5   4   3  38.375  76.75   1.4408        57.3      3.2      3.0     6.0
   33   6   4   0  39.279  78.559  1.41282       30.6      1.7      1.6     6.0
   34   2   7   0  39.729  79.459  1.39943       84.7      4.8      4.5     6.0
   35   7   2   1  40.178  80.356  1.38641       70.2      4.0      3.7     6.0
   36   6   4   2  41.072  82.143  1.36143       55.5      3.1      2.9     6.1
   37   2   2   7  41.517  83.034  1.34943       41.3      2.3      2.2     6.1
   38   7   3   1  42.405  84.81   1.32636       69.1      3.9      3.6     6.1
   39   6   4   3  43.291  86.582  1.30444       38.2      2.2      2.0     6.1
   40   1   5   6  43.733  87.467  1.29388       35.8      2.0      1.9     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)