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Concurrent treatment of metamict and crystalline fergusonite by U, Th and Pb-rich fluids:an EMPA and TEM study
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SYSNO ASEP 0358468 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Concurrent treatment of metamict and crystalline fergusonite by U, Th and Pb-rich fluids:an EMPA and TEM study Author(s) Škoda, R. (CZ)
Čopkajová, R. (CZ)
Klementová, Mariana (UACH-T) RID, SAI, ORCIDSource Title Asociation Geologica Argentina, Series D - ISSN 0328-2767
Roč. 14, č. 1 (2011), s. 197-199Number of pages 3 s. Language eng - English Country AR - Argentina Keywords fergusonite ; metamict state ; experimental alteration ; EMPA ; TEM Subject RIV DB - Geology ; Mineralogy R&D Projects KJB301630801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40320502 - UACH-T (2005-2011) Annotation Metamict and well crystalline fergusonite-(Y) were treated by U,Th,Pb-rich fluids at temperature 200oC for 60 days. The well crystalline fergusonite did not show any apparent features of alteration. The metamict fergusonite was intensivelly replaced by newly-formed U and Th-rich phases. The TEM study of the FIB prepared foils revealed, that Th-rich phase is amorphous, whereas the U-rich phase corresponds to UNb3O10. On the border of unchanged metamict fergusonite and newly-formed phases the numerous of nanopores were found. The alteration corresponds to dissolution-reaction-precipitation process. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2011
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