[Wien] irrep

[Christian.Koitzsch at gmx.ch]

Hi everybody,

I have a question regarding the output of irrep in case.irrep
Below I shown an example kpoint:


    21  0.000000  0.000000  0.000000 # k number, k-vector
   Oh  48        10                  # pnt-grp, no symm.ops, no classes

    E  
 42
  8C3  
  4  5 27 30 31 34 38 39
  3C2  
  1 26 35
  6C4  
 16 17 20 24 43 47
  6C2` 
  8  9 12 13 21 46
    I  
  7
 8IC3  
 10 11 15 18 19 22 44 45
 3IC2  
 14 23 48
 6IC4  
  2  6 25 29 32 33
 6IC2` 
  3 28 36 37 40 41
        17
         1         1 -4.464477    1  1    0  0    0  0    0  0
         2         3 -1.785538   -4  3    0  0    0  0    0  0
         3         3 -1.785538   -4  3    0  0    0  0    0  0
         4         3 -1.785538   -4  3    0  0    0  0    0  0
         5         3 -1.093303   -5  3    0  0    0  0    0  0
         6         3 -1.093303   -5  3    0  0    0  0    0  0
         7         3 -1.093303   -5  3    0  0    0  0    0  0
         8         3 -1.092429   -4  3    0  0    0  0    0  0
         9         3 -1.092429   -4  3    0  0    0  0    0  0
        10         3 -1.092429   -4  3    0  0    0  0    0  0
        11         1 -1.086980   -2  1    0  0    0  0    0  0
        12         1  0.280070    1  1    0  0    0  0    0  0
        13         3  0.899538    5  3    0  0    0  0    0  0
        14         3  0.899538    5  3    0  0    0  0    0  0
        15         3  0.899538    5  3    0  0    0  0    0  0
        16         2  1.157566    3  2    0  0    0  0    0  0
        17         2  1.157566    3  2    0  0    0  0    0  0


So this shows the Gamma Point of bcc tungsten with full cubic symmetry in 10
classes. Can somebody tell, what is the meaning of the 8 numbers behind the
17 eigenvalues, and why do I have only 8 and not 10 lines, as it would
correspond to the number of classes?

Thank you very much


Christian Koitzsch

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