Navegação Ciências Exatas e da Terra por Autor "Porto, Sergio P.S."

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    • Light scattering by lithium tantalate at room temperature 

      Penna, Antonio Fernando S.; Chaves, Alaor Silverio; Andrade, Pedro da Rocha; Porto, Sergio P.S. (1976) [Artigo de periódico]
      The room-temperature Raman spectra of LiTa03 for all symmetry phonons are investigated. We make a new assignment of the phonons, which agrees with the selection rules of a C3 symmetry instead of C3V, contrary to Kaminow ...