EPR spectra of V (IV) in zirconolite-rich ceramics

被引：4

作者：

Bogomolova, LD ^{[1
]}

Stefanovsky, SV

Troole, AY

Vance, ER

机构：

[1] Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia

[2] SIA Radon, Moscow 119121, Russia

[3] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia

来源：

JOURNAL OF MATERIALS SCIENCE | 2001年 / 36卷 / 05期

关键词：

D O I：

10.1023/A:1004894128436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

EPR spectra of V4+ in zirconolite-rich ceramics with nominal composition Ca1.00Gd0.01Zr0.99Ti1.99V0.01O7.00 were studied. It was found that these spectra contain the lines of Gd3+ and V4+ ions. Computer calculation of the spectrum of V4+ with hyperfine structure showed that it is a superposition of two spectra of V4+ ions due to V4+ ions substituting for Ti4+ ions in two non-equivalent positions of these ions in zirconolite lattice. The analysis of linewidths of hyperfine components of the V4+ spectrum indicates the correlated positions of Gd and V in the zirconolite lattice with the distance between them r(v)-Gd similar to1 nm. It is assumed that V5+ ions also substitute for Ti4+ ions and compensate the electric charge of Gd3+ ions, which replace Zr4+ in the same unit cell of zirconolite crystal lattice. (C) 2001 Kluwer Academic Publishers.

引用

页码：1213 / 1217

页数：5

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