Premium
Oblique phonons in uniaxial molecular crystals: Raman spectra of s ‐trioxane
Author(s) -
Kubinyi M.,
Castellucci E.
Publication year - 1981
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250100123
Subject(s) - phonon , raman spectroscopy , condensed matter physics , anisotropy , uniaxial crystal , crystal (programming language) , raman scattering , dispersion (optics) , materials science , molecular physics , chemistry , optics , crystallography , optical axis , physics , lens (geology) , programming language , computer science
Abstract Using Raman scattering the angular dispersion of extraordinary phonons in s ‐trioxane, a uniaxial crystal of trigonal structure, has been measured. It has been found that the transitions are of the type TO → LO or LO → TO so that the anisotropic short‐range forces predominate over the long range electrostatic ones. The LO–TO splittings are of the order of 10 cm −1 or less as expected for molecular crystals. For phonon propagation direction along the optic axis extraordinary and ordinary phonons of E species coincide.