Počet záznamů: 1

Concurrent treatment of metamict and crystalline fergusonite by U, Th and Pb-rich fluids:an EMPA and TEM study

  1. 1.
    0358468 - UACH-T 2011 RIV AR eng J - Článek v odborném periodiku
    Škoda, R. - Čopkajová, R. - Klementová, Mariana
    Concurrent treatment of metamict and crystalline fergusonite by U, Th and Pb-rich fluids:an EMPA and TEM study.
    Asociation Geologica Argentina, Series D. Roč. 14, č. 1 (2011), s. 197-199 ISSN 0328-2767
    Grant CEP: GA AV ČR KJB301630801
    Výzkumný záměr: CEZ:AV0Z40320502
    Klíčová slova: fergusonite * metamict state * experimental alteration * EMPA * TEM
    Kód oboru RIV: DB - Geologie a mineralogie

    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.
    Trvalý link: http://hdl.handle.net/11104/0196503