Various stages of oxidation of chlorite as reflected in the Fe 2∈+∈ and Fe3∈+∈ proportions in the Mössbauer spectra of minerals in Boda Claystone

Károly Lázár, Zoltán Máthé, Mária Földvári, Tibor Németh, Péter Mell

Research output: Contribution to journalArticle

Abstract

The aptness for Fe2∈+∈ → Fe 3∈+∈ changes in claystones may indicate the possibility for various coupled redox processes. Boda Claystone samples were studied from this aspect. Variations in the Fe2∈+∈ and Fe 3∈+∈ ratios and changes in the coordination states of these ions were analysed in samples obtained from different depths (in between 23 and 80 m). The Fe2∈+∈ content is attributed primarily to ferrous iron located in chlorite. On the top region of the strata the Fe 3∈+∈ proportion increases and its coordination is modified. These changes are attributed to secondary transformations and partial weathering. Thus, Fe2∈+∈ in the Boda Claystone may probably participate other redox changes as well.

Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalHyperfine Interactions
Volume190
Issue number1-3
DOIs
Publication statusPublished - Apr 1 2009

    Fingerprint

Keywords

  • Boda Claystone
  • Chlorite
  • Clay minerals

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this