Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure

Abstract The compression of argon is measured between 10 K and 296 K up to 20 GPa and and up to 114 GPa at 296 K in diamond anvil cells. Three samples conditioning are used: (1) single crystal sample directly compressed between the anvils, (2) powder sample directly compressed between the anvils, (3...

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Autores principales:	Agnès Dewaele, Angelika D. Rosa, Nicolas Guignot, Denis Andrault, João Elias F. S. Rodrigues, Gaston Garbarino
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/91d9be55061a4417adf148b36ef5f23e
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spelling	oai:doaj.org-article:91d9be55061a4417adf148b36ef5f23e2021-12-02T16:06:43ZStability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure10.1038/s41598-021-93995-y2045-2322https://doaj.org/article/91d9be55061a4417adf148b36ef5f23e2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93995-yhttps://doaj.org/toc/2045-2322Abstract The compression of argon is measured between 10 K and 296 K up to 20 GPa and and up to 114 GPa at 296 K in diamond anvil cells. Three samples conditioning are used: (1) single crystal sample directly compressed between the anvils, (2) powder sample directly compressed between the anvils, (3) single crystal sample compressed in a pressure medium. A partial transformation of the face-centered cubic (fcc) phase to a hexagonal close-packed (hcp) structure is observed above 4.2–13 GPa. Hcp phase forms through stacking faults in fcc-Ar and its amount depends on pressurizing conditions and starting fcc-Ar microstructure. The quasi-hydrostatic equation of state of the fcc phase is well described by a quasi-harmonic Mie–Grüneisen–Debye formalism, with the following 0 K parameters for Rydberg-Vinet equation: $$V_0$$ V 0 = 38.0 Å $$^3$$ 3 /at, $$K_0$$ K 0 = 2.65 GPa, $$K'_0$$ K 0 ′ = 7.423. Under the current experimental conditions, non-hydrostaticity affects measured P–V points mostly at moderate pressure ( $$\le$$ ≤ 20 GPa).Agnès DewaeleAngelika D. RosaNicolas GuignotDenis AndraultJoão Elias F. S. RodriguesGaston GarbarinoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Agnès Dewaele Angelika D. Rosa Nicolas Guignot Denis Andrault João Elias F. S. Rodrigues Gaston Garbarino Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
description	Abstract The compression of argon is measured between 10 K and 296 K up to 20 GPa and and up to 114 GPa at 296 K in diamond anvil cells. Three samples conditioning are used: (1) single crystal sample directly compressed between the anvils, (2) powder sample directly compressed between the anvils, (3) single crystal sample compressed in a pressure medium. A partial transformation of the face-centered cubic (fcc) phase to a hexagonal close-packed (hcp) structure is observed above 4.2–13 GPa. Hcp phase forms through stacking faults in fcc-Ar and its amount depends on pressurizing conditions and starting fcc-Ar microstructure. The quasi-hydrostatic equation of state of the fcc phase is well described by a quasi-harmonic Mie–Grüneisen–Debye formalism, with the following 0 K parameters for Rydberg-Vinet equation: $$V_0$$ V 0 = 38.0 Å $$^3$$ 3 /at, $$K_0$$ K 0 = 2.65 GPa, $$K'_0$$ K 0 ′ = 7.423. Under the current experimental conditions, non-hydrostaticity affects measured P–V points mostly at moderate pressure ( $$\le$$ ≤ 20 GPa).
format	article
author	Agnès Dewaele Angelika D. Rosa Nicolas Guignot Denis Andrault João Elias F. S. Rodrigues Gaston Garbarino
author_facet	Agnès Dewaele Angelika D. Rosa Nicolas Guignot Denis Andrault João Elias F. S. Rodrigues Gaston Garbarino
author_sort	Agnès Dewaele
title	Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
title_short	Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
title_full	Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
title_fullStr	Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
title_full_unstemmed	Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
title_sort	stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/91d9be55061a4417adf148b36ef5f23e
work_keys_str_mv	AT agnesdewaele stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure AT angelikadrosa stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure AT nicolasguignot stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure AT denisandrault stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure AT joaoeliasfsrodrigues stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure AT gastongarbarino stabilityandequationofstateoffacecenteredcubicandhexagonalclosepackedphasesofargonunderpressure
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Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure

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