• The normal vibrations in some typical cubic crystals

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/018/05/0257-0265

    • Keywords

       

      Normal Vibration; Distinct Frequency; Trigonal Axis; Octahedral Plane; Introductory Paper

    • Abstract

       

      The normal modes of vibration of the simple cubic, body-centred and face-centred lattices as well as of the zincblende, diamond, rock-salt, flourspar and caesium chloride lattices have been derived by simple geometric methods on the basis of the fundamental ideas set out by Sir C. V. Raman in the introductory paper of the symposium. It is shown that the lattices mentioned have 5, 4, 4, 9, 8, 9, 14 and 11 distinct frequencies respectively.

    • Author Affiliations

       

      E V Chelam1

      1. Department of Physics, Indian Institute of Science, Bangalore
    • Dates

       
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