Glass Physics and Chemistry

, Volume 32, Issue 3, pp 296–303 | Cite as

Raman and dielectric spectra of the glass and single crystal of Li2Ge7O15 in the frequency range 3–1000 cm−1: I. Comparison of the structures of the crystal and initial glass

  • V. N. Sigaev
  • S. V. Lotarev
  • E. N. Smelyanskaya
  • P. D. Sarkisov
  • A. A. Volkov
  • G. A. Komandin
  • V. V. Koltashev
  • V. G. Plotinichenko


The Raman and dielectric spectra of vitreous and single-crystal lithium heptagermanates are measured over a wide range of frequencies from 3 to 1000 cm−1. It is revealed that the spectra of the Li2O · 7GeO2 glass and the Li2Ge7O15 crystal are similar to each other because the intense but broad bands in the spectrum of the glass correspond to the most intense groups of bands in the spectrum of the crystal. The similarity is observed over the entire frequency range, including the range of the boson peak. This indicates that the shortrange orders in the structures of the glass and the crystal are similar to each other and that the medium-range order in the glass resembles the main structural motif of the crystal.


Raman Spectrum Glass Physic Borate Glass Dielectric Spectrum Entire Frequency Range 
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Copyright information

© Pleiades Publishing, Inc. 2006

Authors and Affiliations

  • V. N. Sigaev
    • 1
  • S. V. Lotarev
    • 1
  • E. N. Smelyanskaya
    • 1
  • P. D. Sarkisov
    • 1
  • A. A. Volkov
    • 2
  • G. A. Komandin
    • 2
  • V. V. Koltashev
    • 3
  • V. G. Plotinichenko
    • 3
  1. 1.Mendeleev University of Chemical TechnologyMoscowRussia
  2. 2.Institute of General PhysicsRussian Academy of SciencesMoscowRussia
  3. 3.Research Center of Fiber Optics, Institute of General PhysicsRussian Academy of SciencesMoscowRussia

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