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Título

Phase diagram of calcium at high pressure and high temperature

AutorAnzellini, S.; Errandonea, D.; MacLeod, S. G.; Botella, P.; Daisenberger, D.; De'Ath, J. M.; González-Platas, Javier; Ibáñez Insa, Jordi CSIC ORCID ; McMahon, M. I.; Munro, K. A.; Popescu, C.; Ruiz-Fuertes, J.; Wilson, C. W.
Palabras claveAlkaline-earth metals
X-Ray-diffraction
Equation of state
Transitions
Synchrotron
Fecha de publicación2018
EditorAmerican Physical Society
CitaciónPhysical Review Materials, 2(8): 083608 (2018)
ResumenResistively 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.
Versión del editorhttps://doi.org/10.1103/PhysRevMaterials.2.083608
URIhttp://hdl.handle.net/10261/169878
DOI10.1103/PhysRevMaterials.2.083608
E-ISSN2475-9953
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