Zeta-Fe2O3 - A new stable polymorph in iron(III) oxide family

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33155582" target="_blank" >RIV/61989592:15310/15:33155582 - isvavai.cz</a>
Result on the web
<a href="http://www.nature.com/articles/srep15091" target="_blank" >http://www.nature.com/articles/srep15091</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/srep15091" target="_blank" >10.1038/srep15091</a>

Result language
angličtina
Original language name
Zeta-Fe2O3 - A new stable polymorph in iron(III) oxide family
Original language description
Iron(III) oxide shows a polymorphism, characteristic of existence of phases with the same chemical composition but distinct crystal structures and, hence, physical properties. Four crystalline phases of iron(III) oxide have previously been identified: alpha-Fe2O3 (hematite), beta-Fe2O3, gamma-Fe2O3 (maghemite), and epsilon-Fe2O3. All four iron(III) oxide phases easily undergo various phase transformations in response to heating or pressure treatment, usually forming hexagonal alpha-Fe2O3, which is the most thermodynamically stable Fe2O3 polymorph under ambient conditions. Here, from synchrotron X-ray diffraction experiments, we report the formation of a new iron(III) oxide polymorph that we have termed zeta-Fe2O3 and which evolved during pressure treatment of cubic beta-Fe2O3 (Ia (3) over bar space group) at pressures above 30 GPa. Importantly, zeta-Fe2O3 is maintained after pressure release and represents the first monoclinic Fe2O3 polymorph (I2/a space group) that is stable at atmosp
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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