Unexpected 3+ valence of iron in FeO2, a geologically important material lying "in between" oxides and peroxides

Sergey S. Streltsov, Alexey O. Shorikov, Sergey L. Skornyakov, Alexander I. Poteryaev, Daniel I. Khomskii

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Recent discovery of the pyrite FeO2, which can be an important ingredient of the Earth's lower mantle and which in particular may serve as an extra source of water in the Earth's interior, opens new perspectives for geophysics and geochemistry, but this is also an extremely interesting material from physical point of view. We found that in contrast to naive expectations Fe is nearly 3+ in this material, which strongly affects its magnetic properties and makes it qualitatively different from well known sulfide analogue-FeS2. Doping, which is most likely to occur in the Earth's mantle, makes FeO2 much more magnetic. In addition we show that unique electronic structure places FeO2 "in between" the usual dioxides and peroxides making this system interesting both for physics and solid state chemistry.

Original languageEnglish
Article number13005
JournalScientific Reports
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Dec 2017
Externally publishedYes

Fingerprint

Dive into the research topics of 'Unexpected 3+ valence of iron in FeO2, a geologically important material lying "in between" oxides and peroxides'. Together they form a unique fingerprint.

Cite this