Stability and equation of state of face-centered cubic and hexagonal close packed phases of argon under pressure
| Autor: | João Elias Figueiredo Soares Rodrigues, Denis Andrault, Gaston Garbarino, Agnès Dewaele, Angelika Dorothea Rosa, Nicolas Guignot |
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| Přispěvatelé: | Centre d'Études de Limeil-Valenton (CEA-DAM), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Matière en Conditions Extrêmes, Université Paris-Saclay, European Synchroton Radiation Facility [Grenoble] (ESRF), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Magmas et Volcans (LMV), Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement et la société-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Equation of state
Materials science Science [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography chemistry.chemical_element Thermodynamics 02 engineering and technology Cubic crystal system 01 natural sciences Article Diamond anvil cell Phase (matter) 0103 physical sciences Structure of solids and liquids Condensed-matter physics 010306 general physics Multidisciplinary Argon Close-packing of equal spheres 021001 nanoscience & nanotechnology Microstructure Phase transitions and critical phenomena chemistry Medicine 0210 nano-technology Single crystal |
| Zdroj: | Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021) Scientific Reports Scientific Reports, 2021, 11 (1), pp.15192. ⟨10.1038/s41598-021-93995-y⟩ 'Scientific Reports ', vol: 11, pages: 15192-1-15192-12 (2021) |
| ISSN: | 2045-2322 |
| DOI: | 10.1038/s41598-021-93995-y⟩ |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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