scholarly journals Liquid iron-sulfur alloys at outer core conditions by first-principles calculations

2014 ◽  
Vol 41 (19) ◽  
pp. 6712-6717 ◽  
Author(s):  
Koichiro Umemoto ◽  
Kei Hirose ◽  
Saori Imada ◽  
Yoichi Nakajima ◽  
Tetsuya Komabayashi ◽  
...  
Keyword(s):  
Liquid Iron ◽  
First Principles ◽  
Outer Core ◽  
First Principles Calculations ◽  
Iron Sulfur ◽  
Core Conditions

First principles calculations on crystalline and liquid iron at Earth's core conditions

1997 ◽  
Vol 106 ◽  
pp. 205-218 ◽  
Author(s):  
Lidunka Vočadlo ◽  
Gilles A. de Wijs ◽  
Georg Kresse ◽  
Mike Gillan ◽  
Geoffrey D. Price
Keyword(s):  
Liquid Iron ◽  
First Principles ◽  
First Principles Calculations ◽  
Earth’S Core ◽  
Earth's Core ◽  
Core Conditions

scholarly journals First-principles calculations of properties of orthorhombic iron carbideFe7C3at the Earth's core conditions

2015 ◽  
Vol 91 (21) ◽  
Author(s):  
Zamaan Raza ◽  
Nina Shulumba ◽  
Nuala M. Caffrey ◽  
Leonid Dubrovinsky ◽  
Igor A. Abrikosov
Keyword(s):  
First Principles ◽  
First Principles Calculations ◽  
Earth’S Core ◽  
Earth's Core ◽  
Core Conditions

scholarly journals High P–T experiments and first principles calculations of the diffusion of Si and Cr in liquid iron

2017 ◽  
Vol 203 ◽  
pp. 323-342 ◽  
Author(s):  
Esther S. Posner ◽  
David C. Rubie ◽  
Daniel J. Frost ◽  
Vojtěch Vlček ◽  
Gerd Steinle-Neumann
Keyword(s):  
Liquid Iron ◽  
First Principles ◽  
First Principles Calculations

Thermodynamics from first principles: temperature and composition of the Earth’s core

2003 ◽  
Vol 67 (1) ◽  
pp. 113-123 ◽  
Author(s):  
D. Alfé ◽  
M. J. Gillan ◽  
G. D. Price
Keyword(s):  
Melting Temperature ◽  
First Principles ◽  
Inner Core ◽  
Melting Curve ◽  
Outer Core ◽  
Earth’S Core ◽  
Earth's Core ◽  
The Core ◽  
Core Conditions ◽  
Main Ideas

AbstractWe summarize the main ideas used to determine the thermodynamic properties of pure systems and binary alloys from first principles calculations. These are based on the ab initio calculations of free energies. As an application we present the study of iron and iron alloys under Earth,s core conditions. In particular, we report the whole melting curve of iron under these conditions, and we put constraints on the composition of the core. We found that iron melts at 6350士600 K at the pressure corresponding to the boundary between the solid inner core and the liquid outer core (ICB). We show that the core could not have been formed from a binary mixture of Fe with S, Si or O and we propose a ternary or quaternary mixture with 8—10% of S/Si in both liquid and solid and an additional ~8% of oxygen in the liquid. Based on this proposed composition we calculate the shift of melting temperature with respect to the melting temperature of pure Fe of ~—700 K, so that our best estimate for the temperature of the Earth's core at ICB is 5650±600 K.

The properties of iron under core conditions from first principles calculations

2003 ◽  
Vol 140 (1-3) ◽  
pp. 101-125 ◽  
Author(s):  
L Vočadlo ◽  
D Alfè ◽  
M.J Gillan ◽  
G.David Price
Keyword(s):  
First Principles ◽  
First Principles Calculations ◽  
Core Conditions
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