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

共 21 条

[11]

KNYAZEV OA, 1997, P 6 INT C RAD WAST M, P333

[12]

Kohin R. P., 1979, Magnetic Resonance Review, V5, P75

[13] HYPERFINE, SUPERHYPERFINE, AND QUADRUPOLE INTERACTIONS FOR V4+ IN TETRAGONAL GEO2 [J].

MADACSI, DP ;

BARTRAM, RH ;

GILLIAM, OR .

PHYSICAL REVIEW B, 1973, 7 (05) :1817-1825

[14] ELECTRON-SPIN-RESONANCE OF VANADYL IONS IN MG(H2O)6H2EDTA SINGLE-CRYSTALS [J].

NARAYANA, M .

JOURNAL OF CHEMICAL PHYSICS, 1980, 72 (08) :4255-4257

[15] EXTRA ABSORPTION PEAKS IN EPR-SPECTRA OF SYSTEMS WITH ANISOTROPIC G-TENSOR AND HYPERFINE-STRUCTURE IN POWDERS AND GLASSES [J].

OVCHINNIKOV, IV ;

KONSTANTINOV, VN .

JOURNAL OF MAGNETIC RESONANCE, 1978, 32 (02) :179-190

[16]

ROMANOVSKI VN, 1998, SPECTR 98 P INT C AN, V1, P576

[17] Analysis of coordination polyhedra symmetry in pyrochlore and zirconolite structures [J].

Troole, AY ;

Stefanovsky, SV .

SCIENTIFIC BASIS FOR NUCLEAR WASTE MANAGEMENT XXII, 1999, 556 :35-40

[18]

Vance ER, 1996, MATER RES SOC SYMP P, V412, P41

[19]

VANCE ER, 1995, MATER RES SOC SYMP P, V353, P767

[20] A NEUTRON-DIFFRACTION INVESTIGATION OF THE STRUCTURE OF PHOSPHORUS, BARIUM AND LEAD VANADATE GLASSES [J].

WRIGHT, AC ;

YARKER, CA ;

JOHNSON, PAV ;

SINCLAIR, RN .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1985, 76 (2-3) :333-350

← 1 2 3 →