Anharmonic behaviour of lanthanum selenide crystal at high temperatures

Gupta, Chandan; Anon, Kailash; Kumar, Jitendra

doi:10.51514/jstr.3.2.2021.36-40

Cited by 1 publication

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“…From an extension point of view, the expression for elastic modulus with compression can be derived using GEOS. The variation of vibrational frequencies with compression can also be expressed as a Taylor series expansion in Eulerian finite strain, whose volume derivative can be used to calculate the Gruneisen parameter (22,23) .…”

Section: Discussionmentioning

confidence: 99%

A New Formulation of Generalized Equation of State (GEOS) based on Finite Strain Theory and Comparison with other Equations of State (EOSs)

Singh¹,

Ram²,

Kumar³

et al. 2023

IJST

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Objective: To formulate the equation of state as well as their isothermal bulk modulus using the basic laws of thermodynamics and Identities. Method: This study has considered a relation of Eulerian finite strain having two arbitrary parameters a ∈ and b ∈ (a ∈ ,b ∈ ≤ 1). The salient feature of this equation of state is that by substituting the values of parameters, the expressions for the prominent equations of state and their bulk modulus can be obtained. Findings : Four prototype solids viz. MgO, CaO, NaCl, and Al 2 O 3 have been applied to the equation of state to test its validity and applicability. The results were compared with experimental data and other equations of state. Consequently, the proposed equation of state exhibits the same trend as prominent equations of state and provides better results. It corresponds well with the experimental curve at high pressure. Novelty: The GEOS can be used in the future for planning high-pressure experiments on the compression behavior of several materials, minerals, and solids.

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Section: Discussionmentioning

confidence: 99%