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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

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Svazek periodika

5

Číslo periodika v rámci svazku

OCT

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

"15091-1"-"15091-11"

Kód UT WoS článku

000362814500001

EID výsledku v databázi Scopus

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