High-pressure experimental constraints of partitioning behavior of Si and S at the Mercury's inner core boundary

2021 ◽  
Vol 562 ◽  
pp. 116849
Author(s):  
Renbiao Tao ◽  
Yingwei Fei
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Core Boundary ◽  
Partitioning Behavior

Measuring the melting curve of iron at super-Earth core conditions

Science ◽  
2022 ◽  
Vol 375 (6577) ◽  
pp. 202-205
Author(s):  
Richard G. Kraus ◽  
Russell J. Hemley ◽  
Suzanne J. Ali ◽  
Jonathan L. Belof ◽  
Lorin X. Benedict ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Inner Core ◽  
Melting Curve ◽  
Radiation Shielding ◽  
Metal Core ◽  
Earth Core ◽  
Core Boundary ◽  
Earth Like Planets ◽  
Earth’S Inner Core ◽  
Core Conditions

Terapascal iron-melting temperature The pressure and temperature conditions at which iron melts are important for terrestrial planets because they determine the size of the liquid metal core, an important factor for understanding the potential for generating a radiation-shielding magnetic field. Kraus et al . used laser-driven shock to determine the iron-melt curve up to a pressure of 1000 gigapascals (see the Perspective by Zhang and Lin). This value is about three times that of the Earth’s inner core boundary. The authors found that the liquid metal core lasted the longest for Earth-like planets four to six times larger in mass than the Earth. —BG

The high-pressure anisotropic thermoelastic properties of a potential inner core carbon-bearing phase, Fe7C3, by single-crystal X-ray diffraction

2018 ◽  
Vol 103 (10) ◽  
pp. 1568-1574 ◽  
Author(s):  
Xiaojing Lai ◽  
Feng Zhu ◽  
Jiachao Liu ◽  
Dongzhou Zhang ◽  
Yi Hu ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystal ◽  
Inner Core ◽  
X Ray Diffraction ◽  
Thermoelastic Properties ◽  
X Ray

scholarly journals Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys

2010 ◽  
Vol 295 (1-2) ◽  
pp. 292-296 ◽  
Author(s):  
Daniele Antonangeli ◽  
Julien Siebert ◽  
James Badro ◽  
Daniel L. Farber ◽  
Guillaume Fiquet ◽  
...  
Keyword(s):  
High Pressure ◽  
Sound Velocity ◽  
Inner Core ◽  
Velocity Measurements ◽  
Earth’S Inner Core

scholarly journals Melting of iron determined by X-ray absorption spectroscopy to 100 GPa

2015 ◽  
Vol 112 (39) ◽  
pp. 12042-12045 ◽  
Author(s):  
Giuliana Aquilanti ◽  
Angela Trapananti ◽  
Amol Karandikar ◽  
Innokenty Kantor ◽  
Carlo Marini ◽  
...  
Keyword(s):  
Melting Temperature ◽  
Absorption Spectroscopy ◽  
Inner Core ◽  
Solid Phase ◽  
Melting Curve ◽  
X Ray ◽  
Core Boundary ◽  
Diamond Anvil ◽  
Laser Heated ◽  
X Ray Absorption

Temperature, thermal history, and dynamics of Earth rely critically on the knowledge of the melting temperature of iron at the pressure conditions of the inner core boundary (ICB) where the geotherm crosses the melting curve. The literature on this subject is overwhelming, and no consensus has been reached, with a very large disagreement of the order of 2,000 K for the ICB temperature. Here we report new data on the melting temperature of iron in a laser-heated diamond anvil cell to 103 GPa obtained by X-ray absorption spectroscopy, a technique rarely used at such conditions. The modifications of the onset of the absorption spectra are used as a reliable melting criterion regardless of the solid phase from which the solid to liquid transition takes place. Our results show a melting temperature of iron in agreement with most previous studies up to 100 GPa, namely of 3,090 K at 103 GPa.

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