Stability and nature of the volume collapse of ε-Fe2O3 under extreme conditions

J. A. Sans (), V. Monteseguro, G. Garbarino, M. Gich, V. Cerantola, V. Cuartero, M. Monte, T. Irifune, A. Muñoz and C. Popescu
Additional contact information
J. A. Sans: Universitat Politècnica de València
V. Monteseguro: European Radiation Synchrotron Facility
G. Garbarino: European Radiation Synchrotron Facility
M. Gich: Institut de Ciència de Materials de Barcelona (ICMAB-CSIC)
V. Cerantola: European Radiation Synchrotron Facility
V. Cuartero: European Radiation Synchrotron Facility
M. Monte: European Radiation Synchrotron Facility
T. Irifune: Ehime University, 2–5 Bunkyo-cho
A. Muñoz: MALTA Consolider Team, Universidad de La Laguna
C. Popescu: ALBA-CELLS

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract Iron oxides are among the major constituents of the deep Earth’s interior. Among them, the epsilon phase of Fe2O3 is one of the less studied polymorphs and there is a lack of information about its structural, electronic and magnetic transformations at extreme conditions. Here we report the precise determination of its equation of state and a deep analysis of the evolution of the polyhedral units under compression, thanks to the agreement between our experiments and ab-initio simulations. Our results indicate that this material, with remarkable magnetic properties, is stable at pressures up to 27 GPa. Above 27 GPa, a volume collapse has been observed and ascribed to a change of the local environment of the tetrahedrally coordinated iron towards an octahedral coordination, finding evidence for a different iron oxide polymorph.

Date: 2018
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-018-06966-9 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06966-9

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-06966-9

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().