Localization of uranium in radiation-damaged nanoheterogeneous natural zircon / Shalaeva E. V.,Murzakaev A. M.,Makarov V. V.,Pushin V. G.,Zamyatin D. A.,Shchapova Yu. V.,Votyakov S. L. // GLASS PHYSICS AND CHEMISTRY. - 2015. - V. 41, l. 4. - P. 389-397.

ISSN/EISSN:

1087-6596 / 1608-313X

Type:

Article

Abstract:

High-uranium natural zircon with signs of hydrothermal (up to 300A degrees C) treatment is studied via transmission electron microscopy, Raman spectroscopy, electron probe microanalysis, and local energy-dispersive analysis performed in situ with a transmission electron microscope. Uranium-based phases are not found in the regions with uranium concentrations of up to 10 wt \% that exceed considerably the limit of solubility in synthetic zirconium silicate. Uranium is dissolved in a heterogeneous matrix that is formed as a result of the decomposition of radiation-damaged (a dose of 10(17) alpha-decays/mg) zircon under hydrothermal influence. The matrix incorporates amorphous partially hydrated silicon oxide and nanocrystalline cubic (Zr,Hf)(1-y) MeyO(2) stabilized with metal Me impurities (Y, Ca, Al, Fe; y a parts per thousand 0.04). Cubic zirconium oxide is regarded as the preferred phase for uranium localization, while the total impurity concentration is similar to 0.13.

Author keywords:

natural zircon; uranium; radiation damage; phase transformations; structure-chemical nanoheterogeneity SOLID-SOLUTIONS; RAMAN-SCATTERING; CUBIC ZIRCONIA; TEMPERATURE; SYSTEM; THORITE; PHASE; TRANSFORMATION; DIFFRACTION; SIMULATION

DOI:

10.1134/S1087659615040136

Web of Science ID:

ISI:000359474800007

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JUL
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-313X
Keywords-Plus	SOLID-SOLUTIONS; RAMAN-SCATTERING; CUBIC ZIRCONIA; TEMPERATURE; SYSTEM; THORITE; PHASE; TRANSFORMATION; DIFFRACTION; SIMULATION
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics
Author-Email	shalaeva@ihim.uran.ru
ResearcherID-Numbers	Vladimir, Pushin/J-4807-2013
ORCID-Numbers	Vladimir, Pushin/0000-0001-7569-0999
Funding-Acknowledgement	interdisciplinary project for fundamental research conducted at the scientific institutes of the Ural Branch of Russian Academy of Sciences {[}12-M-235-2063]
Funding-Text	This study was supported by the interdisciplinary project for fundamental research conducted at the scientific institutes of the Ural Branch of Russian Academy of Sciences, grant no. 12-M-235-2063.
Number-of-Cited-References	35
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	21
Journal-ISO	Glass Phys. Chem.
Doc-Delivery-Number	CO9EE