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Single‐crystal micro‐Raman studies of ZrS 3 , TiS 3 and several Zr 1– x Ti x S 3 compounds (0< x ⩽0.33)
Author(s) -
Gard P.,
Cruege F.,
Sourisseau C.,
Gorochov O.
Publication year - 1986
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.1250170310
Subject(s) - raman spectroscopy , phonon , ternary operation , resonance (particle physics) , raman scattering , polarizability , analytical chemistry (journal) , spectral line , crystallography , chemistry , materials science , atomic physics , condensed matter physics , optics , physics , organic chemistry , chromatography , astronomy , molecule , computer science , programming language
Raman and resonance Raman spectra (100–1000 cm −1 ) of ZrS 3 , several Zr 1– x Ti x S 3 ternary compounds (0< x ⩽0.33) and TiS 3 single crystals have been obtained using a micro‐Mole Raman instrument. For ZrS 3 , when using the 514.5 nm exciting line, the α yy and α xx polarizability components give rise to different resonance Raman spectra, demonstrating definitely that two distinct allowed excitonic transitions are contained in the lowest energy absorption band at ca 500.0 nm. In the ternary phase Zr 1–x Ti x S 3 , the mode behaviour of long‐wavelength optical phonons were investigated through the composition range 0< x ⩽0.33: a mixed one‐, two‐ and three‐mode behaviour was observed, depending on the nature of the vibrations; in particular, the three‐mode behaviour of the diatomic v (SS) 2− mode can be well accounted for in terms of S 2 2− pairs surrounded by either Zr 4+ , Ti 4+ or Zr 4+ and Ti 4+ ions and the relative intensities of the three components are in agreement with a statistical distribution of titanium within the ZrS 3 type structure. Finally, new polarized Raman spectra of TiS 3 have been obtained and band wavenumbers of the Raman active phonons in these compounds compared.