Dear Benyahia, phonon should have produced a dynamical matrix file which also includes the displacement patters. You can compare thos with what is reported in literature to give assign the correct names. It is a long and boring job, but it gets easier with practice.
bests -- Dr. Lorenzo Paulatto IdR @ IMPMC -- CNRS & Universit? Paris 6 +33 (0)1 44 275 084 / skype: paulatz http://www-int.impmc.upmc.fr/~paulatto/ 23-24/4?16 Bo?te courrier 115, 4 place Jussieu 75252 Paris C?dex 05
