Hyperfine interactions in and lattice parameters of pyrochlore and defect fluorite (Eu1-xNdx)2Zr2O7

A. Oxides; C. Mössbauer spectroscopy; C. X-ray diffraction; Chemical compounds; Defects; Europium compounds; Fluorspar; Isomers; Lattice constants; Neodymium; X ray diffraction; Zirconium; High energy x-ray diffraction; Hyperfine interactions; Lattice expansion; Quadrupole splitting; Spectral parameters; Ssbauer spectroscopies; Temperature dependent; Wet-chemical approach; Europium

Abstract :

[en] Pyrochlore and defect fluorite (Eu1-xNdx)2Zr2O7 compounds (x=0, 0.5 and 0.75) synthesized by a wet chemical approach were investigated using temperature dependent high energy X-ray diffraction as well as 151Eu Mössbauer spectroscopy. Diffraction data reveals an increase in lattice parameter with increasing Nd content, an increase that is disproportionally large between x=0.5 and 0.75. The 151Eu Mössbauer spectral parameters, i.e. isomer shift and quadrupole splitting, fall in separate regions for pyrochlore and defect fluorite type compounds. Between 80 and 350 K, the impact of the order-disorder, i.e. pyrochlore to defect fluorite, transition on isomer shift and quadrupole splitting is found to exceed the one due to lattice expansion. © 2014 Elsevier Ltd. All rights reserved.

Disciplines :

Chemistry

Author, co-author :

Klobes, B.; Jülich Centre for Neutron Science JCNS, Peter Grünberg Institute PGI, Forschungszentrum Jülich GmbH, Jülich, Germany

Finkeldei, S.; Institute of Energy and Climate Research (IEK-6) Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Jülich, Germany

Röhrig, W.; Jülich Centre for Neutron Science JCNS, Peter Grünberg Institute PGI, Forschungszentrum Jülich GmbH, Jülich, Germany

Bosbach, D.; Institute of Energy and Climate Research (IEK-6) Nuclear Waste Management and Reactor Safety, Forschungszentrum Jülich GmbH, Jülich, Germany

Hermann, Raphaël ; Université de Liège > Département de chimie (sciences) > Département de chimie (sciences)

Language :

English

Title :

Hyperfine interactions in and lattice parameters of pyrochlore and defect fluorite (Eu1-xNdx)2Zr2O7

Publication date :

2015

Journal title :

Journal of Physics and Chemistry of Solids

ISSN :

0022-3697

Publisher :

Elsevier, United Kingdom

Volume :

Pages :

43-48

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 14 November 2020

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