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Radiation Induced Structural Changes in Normal Spinels

Published online by Cambridge University Press:  01 February 2011

David Simeone ,
Gianguido Baldinozzi ,
Dominique Gosset ,
Leo Mazerolles  and
Lionel Thome
David Simeone
Affiliation:
david.simeone@cea.fr, CEA, Materiaux Fonctionnels pour l Energie, Equipe Mixte CEA-CNRS-ECP, DEN/DMN/SRMA/LA2M, CEN Saclay, Gif sur yvette, 91191, France
Gianguido Baldinozzi
Affiliation:
gb@ecp.fr, CNRS, Materiaux Fonctionnels pour l'Energie, CNRS-CEA-ECP, Laboratoire SPMS, Ecole Centrale de Paris, Chatenay Malabry, 92292, France
Dominique Gosset
Affiliation:
dominique.gosset@cea.fr, CEA, Materiaux Fonctionnels pour l'Energie, CEA-CNRS-ECP, DEN/DMN/SRMA/LA2M, CEN Saclay, Gif sur yvette, 91191, France
Leo Mazerolles
Affiliation:
mazerolles@glvt-cnrs.fr, CNRS, Institut des Sciences Chimiques Seine Amont, Thiais, 92000, France
Lionel Thome
Affiliation:
thome@csnsm.in2p3.fr, CNRS, CSNSM Orsay, Université Paris XI, Orsay, 91400, France
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Abstract

Ion irradiation induced phase transformations in three normal spinel compounds MgAl2O4, MgCr2O4 and ZnAl2O4 have been investigated by X-ray diffraction, Raman spectroscopy and Transmission Electron Microscopy. This work presents a unified framework to describe the radiation effects in normal spinels. Irradiation modifies the atomic and mesoscopic structures of theses spinels in different ways. At the atomic scale, it produces the inversion of the cations in the spinel structure which can always be described within its usual Fd-3m space group. At the mesoscopic scale, it produces microdomains, responsible for the important changes in the X-ray diffraction patterns.

Keywords

radiation effectsion-solid interactionsx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1043: Symposium T – Materials Innovations for Next-Generation Nuclear Energy , 2007 , 1043-T03-03
Copyright
Copyright © Materials Research Society 2008

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