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The Journal of Mineralogical Society of Poland

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EPR Study of Paramagnetic Defects in Clay Minerals

Joanna Babińska / Krystyna Dyrek / Piotr Wyszomirski
  • Faculty of Material Science and Ceramics, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland
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Published Online: 2008-11-21 | DOI: https://doi.org/10.2478/v10002-007-0021-x

EPR Study of Paramagnetic Defects in Clay Minerals

Radiation induced defects (RID-s) and transition metal ion impurities were revealed by EPR (Electron Paramagnetic Resonance) spectroscopy in kaolinites from a number of Polish deposits. Arelationship between the intensity of the EPR signals of the RID-s and quantity of radioactive elements was defined in these minerals. In one of the deposits of kaolinites (Wyszonowice) the EPR signal intensity depends on grain size. Other clay minerals studied (illites, montmorillonites) only show weak signals of the RID type.

Badania paramagnetycznych defektów w minerałach ilastych metodą EPR

Punktowe defekty strukturalne typu RID-s były badane metodą elektronowego rezonansu paramagnetycznego (EPR) w próbkach kaolinitu pochodzących z różnych złóż Polski. Stwierdzono w nich zależność między ilością defektów strukturalnych a zawartością pierwiastków promieniotwórczych. W przypadku kaolinitu pochodzącego z jednego ze złóż (Wyszonowice) sygnał EPR zależy też od uziarnienia minerału. Pozostałe badane minerały ilaste (illit, montmorillonit) ujawniają jedynie słabe sygnały typu RID.

Keywords: EPR; clay minerals; radiation induced defects

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About the article

Published Online: 2008-11-21

Published in Print: 2007-01-01

Citation Information: Mineralogia, Volume 38, Issue 2, Pages 125–138, ISSN (Online) 1899-8526, ISSN (Print) 1899-8291, DOI: https://doi.org/10.2478/v10002-007-0021-x.

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