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
| Autor: | V. V. Koltashev, E. N. Smelyanskaya, A. A. Volkov, Vladimir N. Sigaev, Sergey V. Lotarev, Gennady A. Komandin, P. D. Sarkisov, V. G. Plotinichenko |
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| Rok vydání: | 2006 |
| Předmět: |
Range (particle radiation)
Materials science Analytical chemistry Physics::Optics chemistry.chemical_element Condensed Matter Physics Condensed Matter::Disordered Systems and Neural Networks Spectral line Crystal symbols.namesake Crystallography Dielectric spectrum chemistry Materials Chemistry Ceramics and Composites symbols Boson peak Lithium Raman spectroscopy Single crystal |
| Zdroj: | Glass Physics and Chemistry. 32:296-303 |
| ISSN: | 1608-313X 1087-6596 |
| DOI: | 10.1134/s1087659606030072 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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