Record details

Title
    Reductive dissolution and Mössbauer spectroscopic study of Fe forms in the fractions of Slovak Fe-rich bentonites
Statement of responsibility
    Peter Komadel, Tomáš Grygar, H. Mehner
Author
    Grygar, Tomáš
    Komadel, Peter
    Mehner, H.
Language
    anglicky
Source title - serial
    Clay minerals
Vol./nr.
    Vol. 33
Pages
    p. 593-599
Year
    1998
Notes
    3 diagr., 2 tab., 2 bibl.
    Zkr. název ser.: Clay Miner.
Subject group
    goethit
    ložisko bentonitu
    minerály jílové
    rozpouštění
    spektrometrie Mössbauerova
    vulkanoklastika
Geographical name
    Slovensko
Keyword
    Bentonites
    Dissolution
    Fe
    Fe-rich
    Forms
    Fractions
    Mössbauer
    Reductive
    Slovak
    Spectroscopic
    Study
Abstract (in english)
   Four samples <2 m fractions of Fe-rich bentonites from the area of the Zvolenská kotlina Basin (Slovakia) have been investigated by Mössbauer spectroscopy and reductive dissolution in ammonium hydrogen oxalate (pH=2.7). Both methods have shown the presence of goethite in the samples. The relative amount of Fe bound in goethite varied more within the samples of bentonite from Zvolenská Slatina, which was redeposited after transport over a short distance, than in the authigenically altered bentonite from Hrochot'. The results of the fits of the reductive dissolution curves suggest size distribution, variation in Al-for-Fe subduction in goethite particles and/or different access of extracting solution to goetite particles present in the analysed fine fractions of bentonites
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    25. 3. 2008
Import date
    8. 8. 2012