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[kxyhu@yahoo.com.cn]

Dear everyone,

In the output file of ABINIT the phonon frequencies are :
Phonon frequencies in cm-1    :                                         
1.428619E+02  1.428619E+02  1.433777E+02  1.626135E+02  1.626135E+02    
1.626135E+02  1.771937E+02  1.771937E+02  2.508085E+02  3.143748E+02    
3.143748E+02  3.197872E+02  5.086941E+02  5.086941E+02  5.910810E+02    
But in the output file of ANADDB the the phonon frequencies are :
  Phonon frequencies in cm-1    :                                         
 -1.903055E+02 -1.903055E+02 -1.364112E+02 -1.364112E+02 -1.364112E+02    
 -8.142267E+01  0.000000E+00  0.000000E+00  0.000000E+00  1.584632E+02    
  1.584632E+02  1.720915E+02  4.732672E+02  4.732672E+02  5.624765E+02    
what is the reason of the large difference between them?

Thank you