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Investigation of Pu Incorporation into Zircon Single Crystal

Published online by Cambridge University Press:  17 March 2011

John M. Hanchar ,
Boris E. Burakov ,
Maria V. Zamoryanskaya ,
Vladimir M. Garbuzov ,
Alexander A. Kitsay  and
Vladimir A. Zirlin
John M. Hanchar
Affiliation:
Department of Earth and Environmental Sciences, The George Washington University, Washington D.C., 20006 USA, e-mail:, [email protected]
Boris E. Burakov
Affiliation:
Laboratory of Applied Mineralogy and Radiogeochemistry, V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, e-mail:, [email protected]
Maria V. Zamoryanskaya
Affiliation:
Laboratory of Applied Mineralogy and Radiogeochemistry, V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, e-mail:, [email protected]
Vladimir M. Garbuzov
Affiliation:
Laboratory of Applied Mineralogy and Radiogeochemistry, V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, e-mail:, [email protected]
Alexander A. Kitsay
Affiliation:
Laboratory of Applied Mineralogy and Radiogeochemistry, V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, e-mail:, [email protected]
Vladimir A. Zirlin
Affiliation:
Laboratory of Applied Mineralogy and Radiogeochemistry, V.G.Khlopin Radium Institute, 28, 2-nd Murinskiy ave., St.Petersburg, 194021, Russia, e-mail:, [email protected]
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Abstract

In order to obtain Pu-doped zircon, (Zr,Pu)SiO4, with a maximum Pu content in the form of solid solution, zircon single crystals have been grown using the flux method from starting materials overloaded with Pu. The crystals obtained ranged from 0.2-0.5 to 3.5-4.5 mm in size, are transparent, and characterized by deep pink-brown color. No inclusions of separate Pu phases were observed in the crystals. The distribution of Pu in crystals is zoned and the Pu content varying from approximately 5 to 14 wt.% el. The zircon unit cell parameters calculated from XRD data of bulk powdered sample were: a=6.620(1); c=5.989(2). The results obtained allow us to conclude that the capacity of the zircon structure to incorporate Pu exceeds 10 wt.% el.; however, additional research is required to study the extent of solid solution, (Zr,Pu)SiO4, at higher Pu contents.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC4.2
Copyright
Copyright © Materials Research Society 2004

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