After a brief report of recent WSi2 Raman results on the band assignme
nt and thermal behavior of the WSi2 lines obtained for both a single c
rystal and a thin film, a calculation of vibrational frequencies and n
ormal coordinates at the zone center is presented. The first results s
how good agreement between observed and calculated frequencies, and co
nfirm our previous description of vibrational modes, The corresponding
force constants relative to Si-Si and W-Si bonds are found to be diff
erent while the bond lengths are very close. The present results will
be used in future calculations at the zone boundary.