Europium structural environment in a sodium disilicate glass by XAS

被引:18
作者
Cicconi, Maria Rita [1 ]
Giuli, Gabriele [1 ]
Paris, Eleonora [1 ]
Dingwell, Donald B. [2 ]
机构
[1] Univ Camerino, Sch Sci & Technol, Geol Div, I-62032 Camerino, Italy
[2] LMU Univ Munich, D-80333 Munich, Germany
关键词
Rare earth doped glasses; Alkali silicate glass; Glass structure; EXAFS; X-ray absorption; X-RAY-ABSORPTION; NEAR-EDGE STRUCTURE; PHOSPHATE-GLASSES; RARE-EARTHS; EU; XANES; EXAFS; METAPHOSPHATE; MINERALS; VALENCE;
D O I
10.1016/j.jnoncrysol.2010.06.029
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The structural environment of europium (Eu) in a synthetic silicate glass of Na2Si2O5 composition has been determined with the final purpose to carry out a detailed investigation of the role of europium in glasses by building a structural model as a function of glass composition. The sample analyzed in this study has been characterized through Eu L-3-edge X-ray Absorption Spectroscopy (XAS), which allowed to obtain Eu oxidation state, coordination number and the < Eu-O > bond distances in the glass. From EXAFS data analysis Eu results to be bonded to six oxygens (< Eu-O > = 2.26 +/- 0.01 angstrom) at the corners of an almost regular octahedron. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:1749 / 1753
页数:5
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