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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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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. |
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STUDIA PHYSICA - Issue no. 2 / 2006 | |||||||
Article: |
FT-IR AND RAMAN SPECTROSCOPIC STUDY OF LI2O-CUO-TEO2 GLASSES. Authors: CARMEN MARCUS, R. CICEO-LUCACEL, I. ARDELEAN. |
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Abstract: The local structure of the xLi2O•(1-x)[2TeO2•CuO] (0 ≤ x ≤ 0.5) glass system was investigated by means of FT-IR and Raman spectroscopies. For the glass network was proposed a structure mainly composed of TeO4 trigonal bipyramids (tbp), TeO3 trigonal pyramids (tp) and TeO3+1 polyhedral units. It was found that with the increase of Li2O content the modification of tellurite network consist in the conversion of a part of TeO4 tbp into TeO3 tp via intermediate coordination TeO3+1 polyhedra. Simultaneously the nonbridging oxygens (NBOs) number increases, denoting the depolymerization of the glass structure. | |||||||
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