EXAFS STUDY OF BA AND LA STRUCTURAL ENVIRONMENTS IN FLUOROZIRCONATE GLASSES

被引：16

作者：

ALMEIDA, RM ^{[1
]}

MARQUES, MID ^{[1
]}

GONCALVES, MC ^{[1
]}

机构：

[1] UL, CTR FIS MAT CONDENSADA, P-1699 LISBON, PORTUGAL

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1994年 / 168卷 / 1-2期

关键词：

D O I：

10.1016/0022-3093(94)90130-9

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 anionic structures around Ba and La cations have been studied by EXAFS spectroscopy in two-component and multicomponent fluorozirconate glasses. The Ba-F distances and Ba coordination numbers were about 2.70 Angstrom and 7.2-7.4 in all glasses, respectively, similar to those in crystalline BaF2, whereas the La-F distances and coordination numbers were about 2.43 Angstrom and 9.6 in all glasses, similar to those of LaF3, within the experimental error. The structural roles of Ba and La in these fluorozirconate glasses appear to be those of a modifier and of an intermediate cation, respectively.

引用

页码：144 / 149

页数：6

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