RAMAN-SCATTERING STUDIES OF LITHIUM-INTERCALATED NIPS3

Citation
I. Kerrache et al., RAMAN-SCATTERING STUDIES OF LITHIUM-INTERCALATED NIPS3, Solid state ionics, 92(1-2), 1996, pp. 37-43
Citations number
29
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
ISSN journal
01672738
Volume
92
Issue
1-2
Year of publication
1996
Pages
37 - 43
Database
ISI
SICI code
0167-2738(1996)92:1-2<37:RSOLN>2.0.ZU;2-V
Abstract
We report on the vibrational properties of lithium-intercalated NiPS3 microcrystalline samples. Raman scattering spectra of LixNiPS3 (0 less than or equal to x less than or equal to 1.16) compounds have been re corded as a function of temperature in the wavenumber range 50-700 cm( -1). The new peak located at 313 cm(-1) is interpreted as a stretching mode due to vibration of lithium atoms located in the van der Waals g ap against the nearest neighbouring sulphur atoms. Results are analyze d in terms of stretching vibrations of LiS6 entities. It is concluded that lithium ions are more likely to occupy octahedral sites in the li thium-rich phase. Using a simple model of lattice dynamics, the coupli ng force constants are determined and compared with those in the prist ine material.