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Title: Melting of iron determined by X-ray absorption spectroscopy to 100 GPa

Abstract

There is a long-standing controversy over the melting curve of Fe at high pressure as determined from static laser heated diamond anvil cell and dynamic compression studies. X-ray absorption spectroscopy measurements are used here as a criterion to detect melting under pressure. Confronted with a diversity of obtained melting curves, this technique, used at such pressure and temperature conditions, is eligible to be at the forefront to probe Earth's deep interior. Furthermore, the experiment reported here holds promise for addressing important issues related to the structure and phase diagram of compressed melts, such as the existence of structural complexity (polyamorphism) in the liquid phase or the extent of icosahedral ordering whose investigation has been limited until now to ambient conditions.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1387249
DOE Contract Number:  
SC0001057
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America; Journal Volume: 112; Journal Issue: 39; Related Information: EFree partners with Carnegie Institution of Washington (lead); California Institute of Technology; Colorado School of Mines; Cornell University; Lehigh University; Pennsylvania State University
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; catalysis (heterogeneous), solar (photovoltaic), phonons, thermoelectric, energy storage (including batteries and capacitors), hydrogen and fuel cells, superconductivity, charge transport, mesostructured materials, materials and chemistry by design, synthesis (novel materials)

Citation Formats

Aquilanti, Giuliana, Trapananti, Angela, Karandikar, Amol, Kantor, Innokenty, Marini, Carlo, Mathon, Olivier, Pascarelli, Sakura, and Boehler, Reinhard. Melting of iron determined by X-ray absorption spectroscopy to 100 GPa. United States: N. p., 2015. Web. doi:10.1073/pnas.1502363112.
Aquilanti, Giuliana, Trapananti, Angela, Karandikar, Amol, Kantor, Innokenty, Marini, Carlo, Mathon, Olivier, Pascarelli, Sakura, & Boehler, Reinhard. Melting of iron determined by X-ray absorption spectroscopy to 100 GPa. United States. doi:10.1073/pnas.1502363112.
Aquilanti, Giuliana, Trapananti, Angela, Karandikar, Amol, Kantor, Innokenty, Marini, Carlo, Mathon, Olivier, Pascarelli, Sakura, and Boehler, Reinhard. Mon . "Melting of iron determined by X-ray absorption spectroscopy to 100 GPa". United States. doi:10.1073/pnas.1502363112.
@article{osti_1387249,
title = {Melting of iron determined by X-ray absorption spectroscopy to 100 GPa},
author = {Aquilanti, Giuliana and Trapananti, Angela and Karandikar, Amol and Kantor, Innokenty and Marini, Carlo and Mathon, Olivier and Pascarelli, Sakura and Boehler, Reinhard},
abstractNote = {There is a long-standing controversy over the melting curve of Fe at high pressure as determined from static laser heated diamond anvil cell and dynamic compression studies. X-ray absorption spectroscopy measurements are used here as a criterion to detect melting under pressure. Confronted with a diversity of obtained melting curves, this technique, used at such pressure and temperature conditions, is eligible to be at the forefront to probe Earth's deep interior. Furthermore, the experiment reported here holds promise for addressing important issues related to the structure and phase diagram of compressed melts, such as the existence of structural complexity (polyamorphism) in the liquid phase or the extent of icosahedral ordering whose investigation has been limited until now to ambient conditions.},
doi = {10.1073/pnas.1502363112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 39,
volume = 112,
place = {United States},
year = {Mon Sep 14 00:00:00 EDT 2015},
month = {Mon Sep 14 00:00:00 EDT 2015}
}