X-ray diffraction measurements of Mo melting to 119 GPa and the high pressure phase diagram
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X-ray diffraction measurements of Mo melting to 119 GPa and the high pressure phase diagram

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X-ray diffraction measurements of Mo melting to 119 GPa and the high pressure phase diagram

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dc.contributor.author Santamaría-Pérez, D.
dc.contributor.author Ross, M.
dc.contributor.author Errandonea, Daniel Jorge Hugo
dc.contributor.author Mukherjee, G. D.
dc.contributor.author Mezouar, M.
dc.contributor.author Boehler, R.
dc.date.accessioned 2010-05-21T10:59:48Z
dc.date.available 2010-05-21T10:59:48Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10550/4358
dc.language.iso en en
dc.relation http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf&id=JCPSA6000130000012124509000001&idtype=cvips&prog=normal&doi=10.1063/1.3082030 en
dc.source SANTAMARÍA PÉREZ, D. ; ROSS, M. ; ERRANDONEA, D. ; MUKHERJEE, G.D. ; MEZOUAR, M. ; BOEHLER, R. X-ray diffraction measurements of Mo melting to 119 GPa and the high pressure phase diagram. En: Journal of Chemical Physics, 2009, vol. 130 en
dc.subject Acoustic wave velocity ; High-pressure effects ; Melting ; Molybdenum ; Phase diagrams ; Shock wave effects ; X-ray diffraction en
dc.title X-ray diffraction measurements of Mo melting to 119 GPa and the high pressure phase diagram en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::FÍSICA::Química física en
dc.identifier.doi 10.1063/1.3082030 en
dc.description.abstractenglish In this paper, we report angle-dispersive X-ray diffraction data of molybdenum melting, measured in a double-sided laser-heated diamond-anvil cell up to a pressure of 119 GPa and temperatures up to 3400 K. The new melting temperatures are in excellent agreement with earlier measurements up to 90 GPa that relied on optical observations of melting and in strong contrast to most theoretical estimates. The X-ray measurements show that the solid melts from the bcc structure throughout the reported pressure range and provide no evidence for a high temperature transition from bcc to a close-packed structure, or to any other crystalline structure. This observation contradicts earlier interpretations of shock data arguing for such a transition. Instead, the values for the Poisson ratios of shock compressed Mo, obtained from the sound speed measurements, and the present X-ray evidence of loss of long-range order suggest that the 210 GPa ( ∼ 4100 K) transition in the shock experiment is from the bcc structure to a new, highly viscous, structured melt. en
dc.description.private Daniel.Errandonea@uv.es en

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