Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului.

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.