Molecular Relaxation in LiNO3–LiClO4 and Li2CO3–Li2SO4 Solid Binary Systems

Molecular Relaxation in LiNO3–LiClO4 and Li2CO3–Li2SO4 Solid Binary Systems The paper presents spectroscopic combinational scattering investigations of the molecular relaxation in LiNO3–LiClO4 and Li2CO3–Li2SO4 solid binary systems. It is found that the relaxation time for ν1(A) vibrations of NO3 – anion in LiNO3–LiClO4 system is lower than in LiNO3 crystal. And the relaxation time for ν1(A) vibrations of CO3 2– anion in Li2CO3–Li2SO4 system is lower than in Li2CO3 crystal. The increase in the relaxation time is explained by the additional relaxation mechanism of the excited mode of nitrate and carbon ions which is observed in these systems. This mechanism is linked to the vibrations of other anions (ClO4 – or SO4 2–) and a nucleation of the lattice phonon. Experiments show that the additional relaxation mechanism occurs due to the vibration difference which corresponds to the area of rather a high density of states of the phonon spectrum. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Physics Journal Springer Journals

Molecular Relaxation in LiNO3–LiClO4 and Li2CO3–Li2SO4 Solid Binary Systems

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Physics; Physics, general; Optics, Lasers, Photonics, Optical Devices; Condensed Matter Physics; Nuclear Physics, Heavy Ions, Hadrons; Theoretical, Mathematical and Computational Physics
ISSN
1064-8887
eISSN
1573-9228
D.O.I.
10.1007/s11182-018-1400-z
Publisher site
See Article on Publisher Site

Abstract

The paper presents spectroscopic combinational scattering investigations of the molecular relaxation in LiNO3–LiClO4 and Li2CO3–Li2SO4 solid binary systems. It is found that the relaxation time for ν1(A) vibrations of NO3 – anion in LiNO3–LiClO4 system is lower than in LiNO3 crystal. And the relaxation time for ν1(A) vibrations of CO3 2– anion in Li2CO3–Li2SO4 system is lower than in Li2CO3 crystal. The increase in the relaxation time is explained by the additional relaxation mechanism of the excited mode of nitrate and carbon ions which is observed in these systems. This mechanism is linked to the vibrations of other anions (ClO4 – or SO4 2–) and a nucleation of the lattice phonon. Experiments show that the additional relaxation mechanism occurs due to the vibration difference which corresponds to the area of rather a high density of states of the phonon spectrum.

Journal

Russian Physics JournalSpringer Journals

Published: Jun 4, 2018

References

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