Journal of Materials Science

, Volume 44, Issue 11, pp 2899–2906 | Cite as

Optical properties and structure of R2O–Ga2O3–SiO2 and RO–Ga2O3–SiO2 glasses

  • H. DoweidarEmail author


Refractive index and molar refraction of Li2O–, Na2O–, CaO–, and BaO–Ga2O3–SiO2 glasses have been used to test the validity of a structural model of silicate glasses containing Ga2O3 glasses. Ga2O3 enters these types of glass in a similar manner as Al2O3. It is assumed that, for (SiO2/Ga2O3) >1 and (Ga2O3/R2O) ≤1, Ga2O3 associates primarily with modifier oxides to form GaO4 units. The rest of modifier oxide forms silicate units with non-bridging oxygen ions. Silicate structural units have the same factors as found for binary alkali- and alkaline earth silicate glasses. Differences between experimental and model values suggest another structure for (Ga2O3/SiO2) ≥1.


Li2O Ga2O3 Modifier Oxide Molar Refraction SiO2 Glass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The author is grateful to two anonymous reviewers for their constructive comments that were useful in preparing the revised version of the article.


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© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Glass Research Group, Physics Department, Faculty of ScienceMansoura UniversityMansouraEgypt

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