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Structural Characterisations of Rare Earth-Rich Glasses for Nuclear Waste Immobilisation

Published online by Cambridge University Press:  01 February 2011

I. Bardez ,
D. Caurant ,
F. Ribot ,
P. Loiseau ,
J. L. Dussossoy ,
F. Villain ,
N. Baffier  and
C. Fillet
I. Bardez
Affiliation:
Commissariat à l'Energie Atomique, Centre d'Etudes de la vallée du Rhône, DIEC/SCDV/LEBM, 30207 Bagnols-sur-Cèze, France Laboratoire de Chimie Appliquée de l'Etat Solide (UMR 7574), ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
D. Caurant
Affiliation:
Laboratoire de Chimie Appliquée de l'Etat Solide (UMR 7574), ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
F. Ribot
Affiliation:
Chimie de la Matière Condensée (UMR 7574), Université Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
P. Loiseau
Affiliation:
Laboratoire de Chimie Appliquée de l'Etat Solide (UMR 7574), ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
J. L. Dussossoy
Affiliation:
Commissariat à l'Energie Atomique, Centre d'Etudes de la vallée du Rhône, DIEC/SCDV/LEBM, 30207 Bagnols-sur-Cèze, France
F. Villain
Affiliation:
Laboratoire de Chimie Inorganique et Matériaux Moléculaires, Université Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France
N. Baffier
Affiliation:
Laboratoire de Chimie Appliquée de l'Etat Solide (UMR 7574), ENSCP, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
C. Fillet
Affiliation:
Commissariat à l'Energie Atomique, Centre d'Etudes de la vallée du Rhône, DIEC/SCDV/LEBM, 30207 Bagnols-sur-Cèze, France
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Abstract

New glassy matrices, able to incorporate new highly concentrated radioactive liquid wastes (HLW), are being studied. Investigations were performed on rare earth-rich glasses, known as very durable matrices. The selected basic glass composition was (wt. %): 51.0 SiO2 – 8.5 B2O3–12.2 Na2O – 4.3 Al2O3 – 4.8 CaO – 3.2 ZrO2 – 16.0 Nd2O3. To determine both the environment around the rare earth in this glass and its evolution according to its concentration (1.3 – 30 wt. % Nd2O3), EXAFS (Extended X-Ray Absorption Fine Structure) spectroscopy at the LIII-edge of neodymium and optical absorption spectroscopy were used. By coupling these two characterisation methods, several hypotheses are proposed about the nature of the rare earth neighbouring in the glass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 807: Symposium Scientific Basis for Nuclear Waste Management XXVII , 2003 , 157
Copyright
Copyright © Materials Research Society 2004

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References

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