Authors: Okajima, Toshihiro; Umesaki, Norimasa; Onishi, Akiok; Jin, Tetsuo; Tanaka, Isao; Yazawa, Tetsuo

Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 47, Number 4, August 2006 , pp. 558-562(5)

Publisher: Society of Glass Technology

Abstract:

The local atomic structure of Eu ions in the crystallised borosilicate glass, 62·5SiO₂-28·25B₂O₃-9·25Na₂O-5Y₂O₃, doped with 0·35 wt% Eu₂O₃ has been investigated through Eu L_III-edge x-ray absorption fine structure spectroscopy, using synchrotron radiation. The oxidation state of Eu ion has been proved to be +3 from the analysis of x-ray absorption near edge structure spectra. The bond length of Eu-O to the nearest neighbour in the borosilicate glass crystallised at 973 K is measured to be the same as that of Y-O in YBO₃ crystal by the analysis of extended x-ray absorption structure spectra. We discuss the environment of Eu ion in the borosilicate glass, taking the results of x-ray diffraction measurement into consideration. It has been clarified that the EuBO₃ crystal, substituted by Eu for Y, can be formed when the crystallisation temperature is relatively high.

Document Type: Research article

Publication date: 2006-08-01

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• In this Subject: Inorganic Chemistry
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