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The Structural Characterization of a Series of Uranium-containing Gadolinium Zirconates

Published online by Cambridge University Press:  23 March 2012

Daniel J. Gregg ,
Yingjie Zhang ,
Zhaoming Zhang ,
Inna Karatchevtseva ,
Mark G. Blackford ,
Gerry Triani ,
Gregory R. Lumpkin  and
Eric R. Vance
Daniel J. Gregg
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Yingjie Zhang
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Zhaoming Zhang
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Inna Karatchevtseva
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Mark G. Blackford
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Gerry Triani
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Gregory R. Lumpkin
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Eric R. Vance
Affiliation:
Institute of Materials Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
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Abstract

A series of uranium-containing gadolinium zirconate samples have been fabricated at 1723 K in air. X-ray diffraction and Raman spectroscopy have confirmed pyrochlore or defect fluorite structures, while diffuse reflectance, X-ray absorption near edge structure and X-ray photoelectron spectroscopies indicate a predominantly U6+ oxidation state, even when Ca2+ was added to charge balance for U4+. The results demonstrate the potential of gadolinium zirconates as host materials for actinides.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1475: Symposium NW – Scientific Basis for Nuclear Waste Management XXXV , 2012 , imrc11-1475-nw35-o42
Copyright
Copyright © Materials Research Society 2012

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References

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