Laser induced Raman spectra of some tungstates and molybdates

Th e Ra m an s pec tra of s in l!ie c rys tal s of Ca WO ,.CaMoO,.l'bWO,.and l'bMoO, have been reo corded us in g a He -Ne laser (A = 6328 A) a nd a n Argo n ion la se r (A = 4880 A) as th e exc itin g radiation so urces.The polar izat ion data have e nabl ed us to classify unambiguou s ly th e observed fundam e ntal s int o th e Ram an act ive spec ies of th e point group c: "' to whic h th ese c r ystal s be long.Th e co mpari so n o f th e s pec tra of th ese c r ys tals in th e low freque ncy region has also e nabl ed us to make a roug; h c las• s ilica tion of th e bands into th e ro tat io nal and th e tran s la tio na l latt ice vibra tion s .