Anisotropy in elastic properties of lithium sodium sulphate hexahydrate single crystal�?�An ultrasonic study

Bulletin of materials science

George Varughese²  J Philip⁴  A Santhosh Kumar³  Godfrey Louis¹ 

[1]Department of Physics, Cochin University of Science and Technology, Kochi 682 022, India$$Department of Physics, Cochin University of Science and Technology, Kochi 682 022, IndiaDepartment of Physics, Cochin University of Science and Technology, Kochi 682 022, India$$

[2]Department of Physics, Catholicate College, Pathanamthitta 689 648, India$$Department of Physics, Catholicate College, Pathanamthitta 689 648, IndiaDepartment of Physics, Catholicate College, Pathanamthitta 689 648, India$$

[3]School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686 560, India$$School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686 560, IndiaSchool of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686 560, India$$

[4]Sophisticated Test and Instrumentation Centre, Cochin University of Science and Technology, Kochi 682 022, India$$Sophisticated Test and Instrumentation Centre, Cochin University of Science and Technology, Kochi 682 022, IndiaSophisticated Test and Instrumentation Centre, Cochin University of Science and Technology, Kochi 682 022, India$$

关键词: Inorganic crystal;    ultrasonics;    elastic properties.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The double sulfate family (ABSO₄), where A and B are alkali metal cations, is the object of great interest owing to the complexity and richness of its sequence of phase transition induced by temperature variation. A new sulfate salt characterized by the presence of water molecule in the unit cell with the chemical formula, Li₂Na₃(SO₄)₂.6H₂O (LSSW), was obtained. The ultrasonic velocity measurement was done with pulse echo overlap technique [PEO]. All the six second order elastic stiffness constants, 𝐶₁₁ = 𝐶₂₂, 𝐶₃₃, 𝐶₄₄ = 𝐶₅₅, 𝐶₁₂, 𝐶₁₄ and 𝐶₁₃ = 𝐶₂₃ are reported for the first time. The anisotropy in the elastic properties of the crystal are well explained by the pictorial representation of the polar plots of phase velocity, slowness, Young’s modulus and linear compressibility in 𝑎–ð�?��? and 𝑎–ð�?��? planes.

【 授权许可】

Unknown