Origin of the two quadrupole doublets in NAu-1 nontronite

John Cashion, Will Gates, Glenn Riley

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

8 Citations (Scopus)


M??ssbauer spectra of octahedral Fe3+ in NAu-1 nontronite, saturated with Na+, K+, NH4+, Ca2+ and La3+ have been analysed as two quadrupole doublets. The interlayer cations were found to affect the mean isomer shift, the quadrupole splitting and the spectral area. By considering the statistically significant nearest cation neighbour coordination environments, the inner doublet has been assigned to an octahedral Fe3+ surrounded by three Fe3+ in the octahedral sheet and eight Si4+ in the tetrahedral sheets. The outer doublet is due to the same octahedral coordination, but combined with [7Si4+, 1Al3+] and [6Si4+, 2Al3+].
Original languageEnglish
Title of host publicationInternational Symposium on the Industrial Applications of the Mossbauer Effect 2009
EditorsHerbert Muller, Michael Reissner, Walter Steiner, Gunter Wiseinger
Place of PublicationBristol England
PublisherIOP Publishing
Pages1 - 4
Number of pages4
Publication statusPublished - 2010
EventInternational Symposium on the Industrial Applications of the Mossbauer Effect 2009 - Vienna, Austria
Duration: 19 Jul 200924 Jul 2009

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Publishing
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596


ConferenceInternational Symposium on the Industrial Applications of the Mossbauer Effect 2009
Abbreviated titleISIAME 2009
OtherAll papers were peer reviewed. The ISIAME symposium is concerned with the application of a nuclear technique, Mössbauer Spectroscopy, to investigate industrially related problems. This technique yields information on certain elements in the solid state, with iron being the most rewarding element. Since iron is an abundant element with many important uses, the reader of these Proceedings will find on its pages a large variety of contributions devoted to such diverse areas as catalysis, magnetism, biology and planetary science (e.g., studies of minerals on the surface of Mars).

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