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Phase diagram of calcium at high pressure and high temperature
Diamond Light Source Ltd., Diamond House, Harwell Science Campus, Didcot, Oxfordshire, United Kingdom.
Departamento de Física Aplicada-Instituto de Ciencia de Materiales, Matter at High Pressure (MALTA) Consolider Team, Universidad de Valencia, Edificio de Investigación, Valencia, Spain.
AWE, Aldermaston, Reading, United Kingdom. SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions,The University of Edinburgh, Edinburgh, United Kingdom.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0001-6930-8415
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2018 (English)In: Physical review materials, ISSN 2475-9953, Vol. 2, no 8, article id 083608Article in journal (Refereed) Published
Abstract [en]

Resistively heated diamond-anvil cells have been used together with synchrotron x-ray diffraction to investigate the phase diagram of calcium up to 50 GPa and 800 K. The phase boundaries between the Ca-I (fcc), Ca-II (bcc), and Ca-III (simple cubic, sc) phases have been determined at these pressure-temperature conditions, and the ambient temperature equation of state has been generated. The equation of state parameters at ambient temperature have been determined from the experimental compression curve of the observed phases by using third-order Birch-Murnaghan and Vinet equations. A thermal equation of state was also determined for Ca-I and Ca-II by combining the room-temperature Birch-Murnaghan equation of state with a Berman-type thermal expansion model.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 2, no 8, article id 083608
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-70985DOI: 10.1103/PhysRevMaterials.2.083608ISI: 000443148600002Scopus ID: 2-s2.0-85059624404OAI: oai:DiVA.org:ltu-70985DiVA, id: diva2:1250958
Note

Validerad;2018;Nivå 2;2018-09-25 (svasva)

Available from: 2018-09-25 Created: 2018-09-25 Last updated: 2019-03-27Bibliographically approved

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Botella, Pablo

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