Iron speciation in natural hyperacid water investigated by Mossbauer spectroscopy

C. Bender Koch, Helge Kildahl Rasmussen, Steen Mørup

Research output: Contribution to journalJournal articleResearchpeer-review


We have demonstrated the usefulness of the archetypical solid state-technique of Mössbauer spectroscopy to non-invasive studies of the redox and coordination chemistry of iron in a natural hyperacid solution from Iron Mountain, CA. Suitable fast cooling conditions were used to prepare a glass from the natural solution. Measurements of spectra at low temperatures (6 and 15 K) and in large external magnetic fields (6 T) of the glassy, frozen solution revealed a behaviour characteristic of slow paramagnetic relaxation of ferric ions. Analyses of the spectral components are in good agreement with dominance of hexaaquairon(III) ions.
Original languageEnglish
JournalSpectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Issue number4
Pages (from-to)928-930
Publication statusPublished - 2009


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