Structural properties of sodium-rich carbonate-silicate melts: An in-situ high-pressure EXAFS study on Y and Sr

In-situ EXAFS combined with a Paris-Edinburgh press (PEP) is an outstanding tool to investigate the local environment of trace elements in melts at high pressure and temperature. A novel design of the pressure assembly ensures a highly stable experimental setup (reaching temperatures of up to 2000 K...

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Published inJournal of physics. Conference series Vol. 712; no. 1; pp. 12083 - 12086
Main Authors Pohlenz, J, Pascarelli, S, Mathon, O, Belin, S, Shiryaev, A, Safonov, O, Veligzhanin, A, Murzin, V, Irifune, T, Wilke, M
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2016
Subjects
Melts
Physics
Sodium
Trace elements
Yttrium
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Summary:In-situ EXAFS combined with a Paris-Edinburgh press (PEP) is an outstanding tool to investigate the local environment of trace elements in melts at high pressure and temperature. A novel design of the pressure assembly ensures a highly stable experimental setup (reaching temperatures of up to 2000 K at 2.5 GPa) while permitting the necessary level of X- ray transmission. This study focuses on the structural incorporation of the geochemically important trace elements Y and Sr in sodium-rich silicate-carbonate melts. Y and Sr K edge EXAFS were collected in transmission mode of the melt (at ∼2.5 GPa, 1600 K) and its respective quench products. Distinct changes in the XANES region suggest a change in site symmetry during the cooling process.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/712/1/012083