scholarly journals Phase relations of Fe3 C and Fe7 C3 up to 185 GPa and 5200 K: Implication for the stability of iron carbide in the Earth's core

2016 ◽  
Vol 43 (24) ◽  
pp. 12,415-12,422 ◽  
Author(s):  
Jin Liu ◽  
Jung-Fu Lin ◽  
Vitali B. Prakapenka ◽  
Clemens Prescher ◽  
Takashi Yoshino
Keyword(s):  
Iron Carbide ◽  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core ◽  
The Stability

scholarly journals Phase relations of Fe-Si alloy in Earth's core

2009 ◽  
Vol 36 (6) ◽  
Author(s):  
Jung-Fu Lin ◽  
Henry P. Scott ◽  
Rebecca A. Fischer ◽  
Yun-Yuan Chang ◽  
Innokenty Kantor ◽  
...  
Keyword(s):  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core

Thermoelastic property and high-pressure stability of Fe7C3: Implication for iron-carbide in the Earth's core

2011 ◽  
Vol 96 (7) ◽  
pp. 1158-1165 ◽  
Author(s):  
Y. Nakajima ◽  
E. Takahashi ◽  
N. Sata ◽  
Y. Nishihara ◽  
K. Hirose ◽  
...  
Keyword(s):  
High Pressure ◽  
Iron Carbide ◽  
Thermoelastic Property ◽  
Earth’S Core ◽  
Earth's Core ◽  
Pressure Stability

The stability of the earth's core and the geodynamo

Nature ◽  
1976 ◽  
Vol 261 (5560) ◽  
pp. 483-484 ◽  
Author(s):  
J. A. JACOBS ◽  
G. MASTERS
Keyword(s):  
Earth’S Core ◽  
Earth's Core ◽  
The Stability

Phase relations in iron-rich systems and implications for the Earth's core

1989 ◽  
Vol 55 (3-4) ◽  
pp. 208-220 ◽  
Author(s):  
William W. Anderson ◽  
Bob Svendsen ◽  
Thomas J. Ahrens
Keyword(s):  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core

scholarly journals Melting Curve and Phase Relations of Fe‐Ni Alloys: Implications for the Earth's Core Composition

2020 ◽  
Vol 47 (14) ◽  
Author(s):  
R. Torchio ◽  
S. Boccato ◽  
F. Miozzi ◽  
A. D. Rosa ◽  
N. Ishimatsu ◽  
...  
Keyword(s):  
Melting Curve ◽  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core ◽  
Ni Alloys ◽  
Core Composition

Ideal FeFeS, FeFeO phase relations and Earth's core

1989 ◽  
Vol 55 (1-2) ◽  
pp. 154-186 ◽  
Author(s):  
Bob Svendsen ◽  
William W. Anderson ◽  
Thomas J. Ahrens ◽  
Jay D. Bass
Keyword(s):  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core

scholarly journals Phase relations in the system Fe–Ni–Si to 200 GPa and 3900 K and implications for Earth's core

2019 ◽  
Vol 512 ◽  
pp. 83-88 ◽  
Author(s):  
Tetsuya Komabayashi ◽  
Giacomo Pesce ◽  
Ryosuke Sinmyo ◽  
Takaaki Kawazoe ◽  
Helene Breton ◽  
...  
Keyword(s):  
Phase Relations ◽  
Earth’S Core ◽  
Earth's Core

scholarly journals Fe5S2 identified as a host for sulfur in Earth’s core

2021 ◽  
Author(s):  
Claire Zurkowski ◽  
Barbara Lavina ◽  
Abigail Case ◽  
Kellie Swadba ◽  
Stella Chariton ◽  
...  
Keyword(s):  
Iron Sulfide ◽  
Inner Core ◽  
Outer Core ◽  
Iron Sulfides ◽  
Earth’S Core ◽  
Earth's Core ◽  
Planetary Cores ◽  
Wide Range ◽  
Metal Metal ◽  
The Stability

Planetary habitability, as we experience on Earth, is linked to a functioning geodynamo which is in part driven by the crystallization of the liquid iron-nickel-alloy core as a planet cools over time. Cosmochemical considerations suggest that sulfur is a candidate light alloying element in rocky planetary cores of varying sizes and oxidation states; such that, iron sulfide phase relations at extreme conditions contribute to outer core thermochemical convection and inner core crystallization in a wide range of planetary bodies. Here we experimentally investigate the structural properties of the Fe-S system and report the discovery of the sulfide, Fe5S2, crystallizing in equilibrium with iron at Earth’s outer core pressures and high temperatures. Using single-crystal X-ray diffraction techniques, Fe5S2 was determined to adopt the complex Ni5As2-type structure (P63cm, Z = 6). These results conclude that Fe5S2 is likely to crystallize at the interface of Earth’s core and mantle and will begin to crystallize during the freezing out of Earth and Venus’ core overtime. The increased metal-metal bonding measured in Fe5S2 compared to the other high P-T iron sulfides may contribute to signatures of higher conductivity from regions of Fe5S2 is crystallization. Fe5S2 could serve as a host for Ni and Si as has been observed in the related meteoritic phase, perryite, (Fe, Ni)8(P, Si)3, adding intricacies to elemental partitioning during inner core crystallization. The stability of Fe5S2 presented here is key to understanding the role of sulfur in the multicomponent crystallization sequences that drive the geodynamics and dictate the structures of Earth and rocky planetary cores.

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