The determination of Ti, Mn and Fe oxidation states in minerals by electron energy-loss spectroscopy

Max T. Otten, Barbara Miner, James H. Rask, P R Buseck

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Electron energy-loss spectroscopy (EELS) as a technique for determining transition-element oxidation states offers several advantages over other methods. Chemical shifts as a function of oxidation state were determined for Ti3+-Ti4+ (2 eV), Mn2+-Mn4+ (3 eV) and Fe2+-Fe3+ (2 eV). The edge energies remain the same for a particular oxidation state, irrespective of the sample, confirming that EELS can be applied to oxidation-state determinations. Several experimental problems were encountered: poor edge resolution at low transition-element contents, difficulties in detecting mixed oxidation states, and in situ oxidation of hydrous minerals, probably through hydrogen loss.

Original languageEnglish (US)
Pages (from-to)285-289
Number of pages5
JournalUltramicroscopy
Volume18
Issue number1-4
DOIs
StatePublished - 1985

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Electron energy loss spectroscopy
Minerals
energy dissipation
minerals
electron energy
Oxidation
oxidation
Transition Elements
spectroscopy
transition metals
Chemical shift
chemical equilibrium
Hydrogen
hydrogen

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation

Cite this

The determination of Ti, Mn and Fe oxidation states in minerals by electron energy-loss spectroscopy. / Otten, Max T.; Miner, Barbara; Rask, James H.; Buseck, P R.

In: Ultramicroscopy, Vol. 18, No. 1-4, 1985, p. 285-289.

Research output: Contribution to journalArticle

Otten, Max T. ; Miner, Barbara ; Rask, James H. ; Buseck, P R. / The determination of Ti, Mn and Fe oxidation states in minerals by electron energy-loss spectroscopy. In: Ultramicroscopy. 1985 ; Vol. 18, No. 1-4. pp. 285-289.
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