Structural Investigation of Fe-Ni-S and Fe-Ni-Si Melts by High-temperature Fluorescence XAFS Measurements

Conference · Wed Feb 28 23:00:00 EST 2007

DOI:https://doi.org/10.1063/1.2644560· OSTI ID:1009013

Manghnani, M; Hong, X; Newville, M; Balogh, J ^[1]

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1. Hawaii

Iron-nickel (Fe-Ni) alloy is regarded as the most abundant constituent of Earth's core, with an amount of 5.5 wt% Ni in the core based on geochemical and cosmochemical models. The structural role of nickel in liquid Fe-Ni alloys with light elements such as S or Si is poorly understood, largely because of the experimental difficulties of high-temperature melts. Recently, we have succeeded in acquiring Ni K-edge fluorescence x-ray absorption fine structure (XAFS) spectra of Fe-Ni-S and Fe-Ni-Si melts and alloys. Different structural environment of Ni atoms in Fe-Ni-S and Fe-Ni-Si melts is observed, supporting the effect of light elements in Fe-Ni melts.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1009013
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
ABSORPTION SPECTROSCOPY
EARTH CORE
FLUORESCENCE
IRON ALLOYS
IRON SILICIDES
IRON SULFIDES
LIQUID METALS
MORPHOLOGY
NICKEL ALLOYS
NICKEL SILICIDES
NICKEL SULFIDES
X-RAY SPECTROSCOPY