• The infra-red absorption spectrum of diamond and its variations

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    • Keywords


      Rocksalt; Tetrahedral Symmetry; Octahedral Plane; Bunsen Flame; Order Band

    • Abstract


      The infra-red absorption spectra of nine cleavage plates of diamond have been investigated in the region of frequencies between 750 and 4000 cm.−1 and their observed spectral behaviours have been elucidated. While the second-order spectrum is similar for all diamonds, the first-order spectrum shows large variations. From the nature of these variations it is concluded that the first-order activity is due neither to chemical impurities nor to mosaicity of structure, but must be attributed to the tetrahedral symmetry of structure possessed by such diamonds.

    • Author Affiliations


      K G Ramanathan1

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


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