Characterization of a rare earth oxide obtained from xenotime mineral

Journal Article · Mon Jan 15 00:00:00 EST 2007 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2006.01.022· OSTI ID:21003519

Vernilli, Fernando ^[1]; Camargo Vernilli, Daniela ^[1]; Ferreira, Bento ^[1]; Silva, Gilbert ^[1]

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1. Department of Materials Engineering. Faculdade de Engenharia Quimica de Lorena, Sao Paulo (Brazil)

This paper reports on the characterization of a rare earth oxide obtained by hydrometallurgy of the mineral xenotime, an yttrium phosphate containing other rare earths, and comparison with mixtures of rare earth oxides prepared in different ways. The results indicated that hydrometallurgy from xenotime yielded a solid solution of the rare earth oxides. However, when the pure rare earth oxides were simply mixed physically then heat-treated at 1000 deg. C, a similar solid solution was not obtained. On the other hand, when the mixtures were prepared using a co-precipitation process, subsequent heat treatment did produce oxide solid solutions similar to that produced by hydrometallurgy of xenotime.

• OSTI ID: 21003519
• Journal Information: Materials Characterization, Vol. 58, Issue 1; Other Information: DOI: 10.1016/j.matchar.2006.01.022; PII: S1044-5803(06)00080-5; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 1044-5803
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPARATIVE EVALUATIONS
COPRECIPITATION
HEAT TREATMENTS
HYDROMETALLURGY
OXIDES
RARE EARTHS
SOLID SOLUTIONS
X-RAY DIFFRACTION
XENOTIME
YTTRIUM PHOSPHATES