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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/010/06/0601-0611

    • Keywords

       

      Etch pits; dislocations; spatial configuration; nodal points; tilt boundaries

    • Abstract

       

      Etch patterns produced on habit rhombohedral faces and rhombohedral cleavages of amethyst crystals are described and illustrated. Fidelity of etchants used is assessed. Also described are paired pits produced on match cleavages etched with the same or different etchants. By prolonged etching experiments it is established that the dislocations penetrate into the body of the crystal. Spatial distribution of dislocation in the body of the crystal is worked out. Uniformly spaced etch pits in an array observed on match cleavages (etched with different etchants) are attributed to low-angle tilt boundaries.

    • Author Affiliations

       

      M S Joshi1 M A Ittyachen1 2 P N Kotru1 3

      1. Physics Department, Sardar Patel University, Vallabh Vidyanagar - 388 120
      2. Department of Physics, University Centre, Kariavattom, Trivandrum - 695 018
      3. Physics Department, University of Jammu, Jammu - 180 001

    • Dates

       
      Published
      June 1978
      Manuscript received
      25 March 1977
      Manuscript revised
      6 March 1978

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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