Pressure-Induced Changes of SO4 Sues in LiNaSO4 Crystal

P. T. C. Freire; O. Pilla; V. Lemos; F. E. A. Melo; I. Guedes; J. Mendes Filho

doi:10.4131/jshpreview.7.137

The Review of High Pressure Science and Technology

Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X

Pressure-Induced Changes of SO₄ Sues in LiNaSO₄ Crystal

P. T. C. Freire, O. Pilla, V. Lemos, F. E. A. Melo, I. Guedes, J. Mendes Filho

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Keywords: lithium sodium sulphate, phase transition, hydrostatic pressure, inelastic light scattering, stretching modes

JOURNAL FREE ACCESS

1998 Volume 7 Pages 137-138

DOI https://doi.org/10.4131/jshpreview.7.137

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Abstract

Hydrostatic pressure-dependent Raman scattering studies in the range 0. 0 - 9. 66 Gpa were carried out in LiNaSO₄ at room temperature in order to investigate its phonon spectra in relation to the phase transition in the crystal. From the behavior of v₁ (SO₄) modes for A₁ species, we observe that the LiNaSO₄ undergoes two phase transitions: one at ∼ 2 GPa and the other for P>5. 5 GPa.

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