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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SELENIDE_PD

1, Pm-verbeekite

PdSe(2)


Orthorhombic  P bca  Z = 4

Pbca

7 .6 .16

Ref.Str.:

         Gronvold F., Rost E. (1957)

         * Acta Cryst., 10, 329

         R: N.A.D.

                   Initial data from BDM-file 

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

             a =   5.741    alpha =   90.0 
             b =   5.866    beta  =   90.0 
             c =   7.691    gamma =   90.0 

    Unit cell volume (cub. angs.) =   259.01

    Molar volume ( cub.cm/mol.) =    39.0 

  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    Pd    = 1.00
   2 0.112   0.117   0.407    0.0    Se    = 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     0.112      0.117      0.407 
     3       1     0.5        0.0        0.5   
     4       2     0.388      0.883      0.907 
     5       1     0.5        0.5        0.0   
     6       2     0.388      0.617      0.407 
     7       1     0.0        0.5        0.5   
     8       2     0.112      0.383      0.907 
     9       2     0.612      0.117      0.093 
    10       2     0.888      0.883      0.593 
    11       2     0.888      0.617      0.093 
    12       2     0.612      0.383      0.593 


X-ray density (g/cm cub.)   =      6.78

MU (1/cm) =     931.939    Mass attenuation coefficient (cm**2/g) =    137.531

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

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

    1    Pd                  3.084        4
                                                 2.4381       2
                                                 2.4439       2
                                                 2.4381       2
                                                 2.4439       2
    2    Se                  4.632       13
                                                 4.3798       2
                                                 4.3798       2
                                                 3.3336       2
                                                 3.3336       2
                                                 4.15         2
                                                 4.15         2
                                                 3.7512       2
                                                 3.7512       2
                                                 2.3631       2
                                                 4.011        2
                                                 4.011        2
                                                 3.5666       2
                                                 3.5666       2

  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   0   0   2 11.555  23.11    0.13    46.96    2      257.7     9294.5
    2   1   1   1 12.285  24.571   0.138   41.3     8       55.3     1505.6
    3   1   0   2 13.951  27.902   0.156   31.57    4      133.4     3352.4
    4   0   2   0 15.226  30.452   0.17    26.19    2      178.4     2484.8
    5   2   0   0 15.566  31.131   0.174   24.98    2      190.9     2713.7
    6   1   1   2 15.934  31.868   0.178   23.75    8      101.8     2933.2
    7   0   2   1 16.324  32.649   0.182   22.54    4      117.9     1867.4
    8   2   1   0 17.383  34.765   0.194   19.66    4      139.5     2281.5
    9   1   2   1 18.147  36.294   0.202   17.9     8      111.7     2662.7
   10   2   1   1 18.366  36.733   0.205   17.43    8       83.7     1455.0
   11   0   2   2 19.287  38.573   0.214   15.65    4      153.6     2201.5
   12   2   0   2 19.564  39.128   0.217   15.16    4      157.8     2250.9
   13   1   1   3 20.75   41.5     0.23    13.3     8      162.2     4174.4
   14   1   2   2 20.886  41.772   0.231   13.11    8       11.9       22.0
   15   2   1   2 21.081  42.162   0.233   12.84    8       51.3      402.8
   16   2   2   0 22.054  44.107   0.244   11.6     4      141.8     1389.9
   17   2   2   1 22.867  45.735   0.252   10.69    8       17.2       37.6
   18   0   2   3 23.519  47.039   0.259   10.03    4      186.5     2079.4
   19   0   0   4 23.617  47.233   0.26     9.94    2        2.8        0.2
   20   1   2   3 24.898  49.797   0.273    8.81    8       21.8       49.8
   21   1   0   4 24.992  49.983   0.274    8.74    4       86.9      393.0
   22   2   1   3 25.069  50.138   0.275    8.68    8      134.0     1857.1
   23   2   2   2 25.186  50.372   0.276    8.58    8      132.4     1793.7
   24   1   3   1 25.343  50.687   0.278    8.46    8      200.7     4066.4
   25   3   1   1 25.79   51.58    0.282    8.13    8      188.4     3444.3
   26   1   1   4 26.258  52.517   0.287    7.81    8       67.4      422.5
   27   3   0   2 26.718  53.436   0.292    7.5     4      143.4      919.5
   28   1   3   2 27.507  55.014   0.3      7.02    8      101.5      862.5
   29   3   1   2 27.93   55.859   0.304    6.78    8       56.7      259.9
   30   2   3   0 28.467  56.934   0.309    6.5     4      140.8      767.7
   31   0   2   4 28.622  57.243   0.311    6.42    4      111.5      476.2
   32   2   2   3 28.744  57.487   0.312    6.36    8       28.1       59.8
   33   2   0   4 28.828  57.656   0.313    6.31    4      103.6      403.8
   34   2   3   1 29.147  58.295   0.316    6.16    8       56.6      235.5
   35   3   2   1 29.402  58.805   0.319    6.04    8      124.4     1115.1
   36   1   2   4 29.832  59.664   0.323    5.85    8        8.1        4.6
   37   2   1   4 29.983  59.966   0.324    5.78    8       79.6      436.9
   38   1   3   3 30.883  61.766   0.333    5.41    8      105.5      717.7
   39   2   3   2 31.133  62.266   0.336    5.32    8       53.1      178.7
   40   3   1   3 31.277  62.553   0.337    5.26    8      107.0      718.3
   41   3   2   2 31.378  62.756   0.338    5.23    8       13.5       11.3
   42   0   4   0 31.685  63.37    0.341    5.12    2       48.0       35.1
   43   0   4   1 32.325  64.649   0.347    4.9     4       18.5       10.0
   44   1   1   5 32.33   64.661   0.347    4.9     8      209.6     2563.8
   45   4   0   0 32.458  64.917   0.348    4.85    2       42.1       25.7
   46   2   2   4 33.303  66.606   0.356    4.59    8      113.3      703.6
   47   1   4   1 33.456  66.911   0.358    4.55    8       17.8       17.2
   48   4   1   0 33.54   67.08    0.359    4.53    4       35.6       34.1
   49   4   1   1 34.161  68.322   0.364    4.36    8       21.5       24.1
   50   0   4   2 34.205  68.409   0.365    4.34    4       50.9       67.1
   51   2   3   3 34.294  68.589   0.366    4.32    8       94.1      456.3
   52   0   2   5 34.434  68.868   0.367    4.28    4       35.4       32.1
   53   3   2   3 34.528  69.055   0.368    4.26    8       25.2       32.3
   54   3   0   4 34.604  69.208   0.369    4.24    4      100.6      256.1
   55   3   3   1 34.893  69.786   0.371    4.17    8       71.3      252.9
   56   4   0   2 34.949  69.898   0.372    4.16    4       52.4       68.1
   57   1   3   4 35.285  70.571   0.375    4.08    8       71.4      247.9
   58   1   4   2 35.306  70.611   0.375    4.07    8       94.2      430.8
   59   1   2   5 35.532  71.064   0.377    4.02    8      101.1      490.3
   60   3   1   4 35.654  71.307   0.378    3.99    8       39.9       76.0
   61   2   1   5 35.67   71.339   0.379    3.99    8       25.6       31.3
   62   4   1   2 35.994  71.989   0.381    3.92    8       13.5        8.5
   63   2   4   0 36.145  72.29    0.383    3.89    4       85.2      168.4
   64   4   2   0 36.691  73.382   0.388    3.78    4       94.8      202.4
   65   3   3   2 36.71   73.421   0.388    3.78    8       60.4      164.3
   66   2   4   1 36.746  73.492   0.388    3.77    8        2.8        0.4
   67   0   0   6 36.936  73.872   0.39     3.73    2       38.2       16.2
   68   0   4   3 37.237  74.474   0.393    3.68    4       30.9       21.0
   69   4   2   1 37.289  74.578   0.393    3.67    8       81.8      292.4
   70   1   0   6 38.004  76.008   0.4      3.54    4       35.9       27.3
   71   1   4   3 38.302  76.605   0.402    3.5     8        3.6        0.6
   72   2   3   4 38.51   77.019   0.404    3.46    8       85.4      300.9
   73   2   4   2 38.529  77.058   0.404    3.46    8       97.6      392.9
   74   3   2   4 38.732  77.465   0.406    3.43    8        9.6        3.7
   75   2   2   5 38.748  77.496   0.406    3.43    8        5.5        1.2
   76   4   1   3 38.971  77.942   0.408    3.39    8       36.0       52.6
   77   1   1   6 39.018  78.036   0.409    3.39    8       28.0       31.8
   78   4   2   2 39.063  78.127   0.409    3.38    8      100.8      409.6
   79   3   3   3 39.668  79.337   0.414    3.3     8      114.2      512.4
   80   1   3   5 40.626  81.252   0.423    3.18    8       38.0       54.7
   81   3   1   5 40.978  81.956   0.426    3.14    8       48.1       86.8
   82   0   2   6 40.981  81.961   0.426    3.14    4       90.0      151.6
   83   2   0   6 41.156  82.312   0.427    3.12    4       81.1      122.3
   84   0   4   4 41.345  82.69    0.429    3.1     4      205.2      778.9
   85   2   4   3 41.448  82.897   0.43     3.09    8        4.8        0.8
   86   4   3   0 41.74   83.479   0.432    3.06    4       38.4       27.0
   87   4   2   3 41.974  83.948   0.434    3.04    8      137.5      685.2
   88   3   4   1 42.012  84.023   0.434    3.04    8       21.2       16.2
   89   1   2   6 42.02   84.04    0.435    3.04    8        3.4        0.4
   90   4   0   4 42.045  84.091   0.435    3.03    4      200.1      724.7
   91   2   1   6 42.151  84.302   0.436    3.02    8       91.5      302.1
   92   4   3   1 42.318  84.635   0.437    3.01    8       15.5        8.6
   93   1   4   4 42.383  84.765   0.438    3.0     8       67.4      162.8
   94   1   5   1 42.654  85.309   0.44     2.98    8      182.6     1185.4
   95   4   1   4 43.037  86.074   0.443    2.95    8       21.9       16.8
   96   5   1   1 43.7    87.401   0.448    2.9     8      184.5     1178.3
   97   3   3   4 43.722  87.443   0.449    2.9     8       43.3       65.0
   98   2   3   5 43.737  87.474   0.449    2.9     8       18.5       11.9
   99   3   4   2 43.741  87.482   0.449    2.9     8      112.3      436.1
  100   3   2   5 43.955  87.909   0.451    2.89    8      120.6      500.7
  101   4   3   2 44.045  88.091   0.451    2.88    8       14.6        7.4
  102   1   5   2 44.381  88.762   0.454    2.86    8       51.5       90.4
  103   5   0   2 44.437  88.874   0.454    2.86    4       48.8       40.6


  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   0   0   2  11.555  23.11   3.8455      9294.5    100.0    100.0     5.6
    2   1   1   1  12.285  24.571  3.62006     1505.6     16.2     16.2     5.6
    3   1   0   2  13.951  27.902  3.19498     3352.4     36.1     35.9     5.6
    4   0   2   0  15.226  30.452  2.933       2484.8     26.7     26.6     5.6
    5   2   0   0  15.566  31.131  2.8705      2713.7     29.2     29.0     5.6
    6   1   1   2  15.934  31.868  2.80579     2933.2     31.6     31.3     5.6
    7   0   2   1  16.324  32.649  2.74049     1867.4     20.1     19.9     5.6
    8   2   1   0  17.383  34.765  2.57835     2281.5     24.5     24.3     5.7
    9   1   2   1  18.147  36.294  2.47316     2662.7     28.6     28.3     5.7
   10   2   1   1  18.366  36.733  2.44463     1455.0     15.7     15.5     5.7
   11   0   2   2  19.287  38.573  2.3321      2201.5     23.7     23.4     5.7
   12   2   0   2  19.564  39.128  2.30031     2250.9     24.2     23.9     5.7
   13   1   1   3  20.75   41.5    2.17415     4174.4     44.9     44.2     5.7
   14   2   1   2  21.081  42.162  2.14153      402.8      4.3      4.3     5.7
   15   2   2   0  22.054  44.107  2.05149     1389.9     15.0     14.7     5.7
   16   0   2   3  23.519  47.039  1.93024     2079.4     22.4     21.9     5.7
   17   1   0   4  24.992  49.983  1.82321      393.0      4.2      4.1     5.7
   18   2   1   3  25.069  50.138  1.81795     1857.1     20.0     19.5     5.7
   19   2   2   2  25.186  50.372  1.81003     1793.7     19.3     18.8     5.8
   20   1   3   1  25.343  50.687  1.79954     4066.4     43.8     42.6     5.8
   21   3   1   1  25.79   51.58   1.77044     3444.3     37.1     36.1     5.8
   22   1   1   4  26.258  52.517  1.74106      422.5      4.5      4.4     5.8
   23   3   0   2  26.718  53.436  1.71325      919.5      9.9      9.6     5.8
   24   1   3   2  27.507  55.014  1.66779      862.5      9.3      9.0     5.8
   25   3   1   2  27.93   55.859  1.64455      259.9      2.8      2.7     5.8
   26   2   3   0  28.467  56.934  1.61603      767.7      8.3      8.0     5.8
   27   0   2   4  28.622  57.243  1.60802      476.2      5.1      4.9     5.8
   28   2   0   4  28.828  57.656  1.59749      403.8      4.3      4.2     5.8
   29   2   3   1  29.147  58.295  1.58149      235.5      2.5      2.4     5.8
   30   3   2   1  29.402  58.805  1.56899     1115.1     12.0     11.6     5.8
   31   2   1   4  29.983  59.966  1.54135      436.9      4.7      4.5     5.8
   32   1   3   3  30.883  61.766  1.50068      717.7      7.7      7.4     5.8
   33   2   3   2  31.133  62.266  1.48982      178.7      1.9      1.8     5.8
   34   3   1   3  31.277  62.553  1.48367      718.3      7.7      7.4     5.8
   35   1   1   5  32.33   64.661  1.44031     2573.8     27.7     26.4     5.9
   36   2   2   4  33.303  66.606  1.4029       703.6      7.6      7.2     5.9
   37   2   3   3  34.294  68.589  1.36709      456.3      4.9      4.7     5.9
   38   3   0   4  34.604  69.208  1.35637      256.1      2.8      2.6     5.9
   39   3   3   1  34.893  69.786  1.34654      252.9      2.7      2.6     5.9
   40   1   4   2  35.306  70.611  1.33281      678.7      7.3      6.9     5.9
   41   1   2   5  35.532  71.064  1.32543      490.3      5.3      5.0     5.9
   42   3   1   4  35.654  71.307  1.3215       107.3      1.2      1.1     5.9
   43   2   4   0  36.145  72.29   1.30594      168.4      1.8      1.7     5.9
   44   4   2   0  36.691  73.382  1.28917      366.8      3.9      3.7     6.0
   45   4   2   1  37.289  74.578  1.27144      292.4      3.1      3.0     6.0
   46   2   4   2  38.529  77.058  1.23658      693.8      7.5      7.0     6.0
   47   4   2   2  39.063  78.127  1.22232      409.6      4.4      4.1     6.0
   48   3   3   3  39.668  79.337  1.20669      512.4      5.5      5.1     6.0
   49   0   2   6  40.981  81.961  1.17456      238.4      2.6      2.4     6.1
   50   2   0   6  41.156  82.312  1.17044      122.3      1.3      1.2     6.1
   51   0   4   4  41.345  82.69   1.16605      778.9      8.4      7.7     6.1
   52   4   2   3  41.974  83.948  1.15175      685.2      7.4      6.8     6.1
   53   4   0   4  42.045  84.091  1.15015      724.7      7.8      7.2     6.1
   54   2   1   6  42.151  84.302  1.14781      302.1      3.3      3.0     6.1
   55   1   4   4  42.383  84.765  1.14272      162.8      1.8      1.6     6.1
   56   1   5   1  42.654  85.309  1.13682     1185.4     12.8     11.7     6.1
   57   5   1   1  43.7    87.401  1.11491     1243.3     13.4     12.2     6.2
   58   3   4   2  43.741  87.482  1.11409      448.0      4.8      4.4     6.2
   59   3   2   5  43.955  87.909  1.10977      500.7      5.4      4.9     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)