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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/032/06/0621-0626

    • Keywords

       

      Inorganic crystal; ultrasonics; elastic properties.

    • Abstract

       

      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–𝑏 and 𝑎–𝑐 planes.

    • Author Affiliations

       

      George Varughese1 A Santhosh Kumar2 J Philip3 Godfrey Louis4

      1. Department of Physics, Catholicate College, Pathanamthitta 689 648, India
      2. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686 560, India
      3. Sophisticated Test and Instrumentation Centre, Cochin University of Science and Technology, Kochi 682 022, India
      4. Department of Physics, Cochin University of Science and Technology, Kochi 682 022, India

    • Dates

       
      Published
      December 2009
      Manuscript received
      1 October 2008
      Manuscript revised
      22 October 2008

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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