The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

Glasses following the composition described by expression xCuO·(1-x)[2TeO₂·Li₂O·0.2GeO₂] were prepared using classical melt quenching technique. Spectroscopic methods, namely FT-IR absorption and Raman scattering, were employed to reveal the structural peculiarities of the synthesized materials. These two complementary techniques are frequently used to obtained detailed information about the structure of the glasses, because are sensitive to local symmetry, character of chemical bonds and other structural properties. The interpretation of the obtained vibrational spectra reveals that the glasses network structure is composed of TeO₄ trigonal bipyramids (tbp), TeO₃ trigonal pyramids (tp), TeO₃₊₁ polyhedral units, and also GeO₄ tetrahedral units. Copper oxide addition implies a change in the tellurium atoms coordination from 4 to 3 via intermediate 3+1 units and an increase of non-bridging oxygen (NBO) amount, modifications reflected in studied glasses spectra.

 Keywords: Lithium-germanium-tellurite glasses, copper ions, FT-IR, Raman