Vol. 33, Issue 1, pp. 125-132

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  2. Optica Applicata Vol. 33, Issue 1, pp. 125-132 (2003)
Vol. 33 Issue 1 pp. 125-132

EXAFS study of glasses of the CaO–Ga2O3–GeO2 system

Damian Chelstowski, Agnieszka Witkowska, Jaroslaw Rybicki, Bohdan Padlyak, Angela Trapananti, Emiliano Principi

Keywords

oxide glasses, structural analysis, EXAFS

Abstract

X-ray absorption spectroscopy (XAS) measurements for Ca3Ga2Ge3O12 and Ca3Ga2Ge4O14 glasses are presented. In particular, the extended X-ray absorption fine structure (EXAFS) spectra are analysed and local neighbourhood of Ga and Ge atoms is described in detail. The Ge/Ga atoms neighbourhood in considered glasses is compared with the data available for corresponding crystals. Performed comparative crystal-glass structural analysis confirms correlation between crystalline and glassy structures of the Ca3Ga2Ge3O12 and Ca3Ga2Ge4O14 compounds. Our results provide several new detailed data, and some general suggestions on the CaO–Ga2O3–GeO2 glass structure.

Vol. 33
Issue 1
pp. 125-132

0.57 MB
OPTICA APPLICATA - a quarterly of the Wrocław University of Science and Technology, Faculty of Fundamental Problems of Technology