Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

Pease, Allison; Li, Jie

doi:10.1016/j.epsl.2022.117865

Cited by 4 publications

(2 citation statements)

References 57 publications

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“…We conclude that in the investigated P‐T‐X range, that is, 19–35 GPa, 2100–2400 K with 0–14.8 mol% O, liquid Fe‐O alloys mix ideally regarding volume and density. In agreement with observations at 1 bar (Komabayashi, 2021) and melting experiments at higher pressures (Chen et al., 2008; Pease & Li, 2022; Pommier et al., 2018) that suggest non‐ideality for the Fe‐S system, we find that volume, density and compressibility cannot be accurately described by linear mixtures of liquid Fe and S (Figure 2 and Figure S3 in Supporting Information ). The excess molar volume of mixing for Fe‐S is taken into account in our mixing model and will be discussed below.…”

Section: Resultssupporting

confidence: 91%

“…Note that only experiments performed at high pressures encompassing Mars' core conditions (19-35 GPa) are compared here through interpolation; extrapolations from lower pressure are not considered due to the uncertainties associated with the extrapolation. higher pressures (Chen et al, 2008;Pease & Li, 2022;Pommier et al, 2018) that suggest non-ideality for the Fe-S system, we find that volume, density and compressibility cannot be accurately described by linear mixtures of liquid Fe and S (Figure 2 and Figure S3 in Supporting Information S1). The excess molar volume of mixing for Fe-S is taken into account in our mixing model and will be discussed below.…”

Section: Density and Incompressibilitymentioning

confidence: 96%

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Thermoelastic Properties of Liquid Fe‐Rich Alloys Under Martian Core Conditions

Huang

Khan

et al. 2023

Geophysical Research Letters

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Seismic measurements made as part of the InSight mission (Banerdt et al., 2020) indicate that Mars' core is large and light with radius and mean density ranging between 1,790 and 1,870 km and 5.7-6.3 g/cm 3 , respectively (Drilleau et al., 2022;Durán et al., 2022;Khan et al., 2022;Stähler et al., 2021). Relative to pure liquid Fe (Kuwayama et al., 2020), this implies a density deficit far in excess of that observed in Earth's core (Birch, 1964). Taken at face value, it requires the incorporation of substantial amounts of light elements (LEs) into the martian core during the early stages of planetary formation (e.g., Khan et al., 2022;Steenstra & van Westrenen, 2018). Previous work that relied mostly on analyses of martian meteorites and cosmochemical arguments (e.g., Lodders

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Section: Resultssupporting

confidence: 91%

Section: Density and Incompressibilitymentioning

confidence: 96%

Thermoelastic Properties of Liquid Fe‐Rich Alloys Under Martian Core Conditions

Huang

Khan

et al. 2023

Geophysical Research Letters

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Structure characterization and failure mechanisms of high chromium cast iron grate bar

Shi,

Xu,

Liu

2024

Engineering Failure Analysis

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High-Pressure Monosulfide Solid Solution FexNi1−xS Phases: X-Ray Diffraction Analysis and Raman Spectroscopy

Spivak,

Sharapova,

Setkova

et al. 2024

Crystals

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High-pressure high-temperature (HPHT) crystalline monosulfide solid solution (Mss) phases (FexNi1−xS, x = 0.90, 0.75, 0.50, 0.25), troilite (FeS I), and α-NiS of the Fe-Ni-S system were synthesized at 7 GPa and 900–1550 °C. The structural parameters of the obtained phases were refined by XRD using the Rietveld method. Factor group analysis revealed the number of active Raman modes for FeS I and α-NiS. Raman spectra of troilite, α-NiS, and Mss phases were obtained. It was shown that the Raman spectra of Mss phases and α-NiS have a similar topology. The Raman spectra of the experimental phases in the Fe-Ni-S system were analyzed with non-negative matrix factorization, which provided a meaningful concentration dependence of the spectral patterns. The spectral components were assigned to the FeS I and α-NiS structures. The structural and spectroscopic studies show linear dependencies of unit cell parameters and spectral components on composition and confirm the existence of a series of monosulfide solid solution FexNi1−xS.

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Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

Cited by 4 publications

References 57 publications

Thermoelastic Properties of Liquid Fe‐Rich Alloys Under Martian Core Conditions

Thermoelastic Properties of Liquid Fe‐Rich Alloys Under Martian Core Conditions

Structure characterization and failure mechanisms of high chromium cast iron grate bar

High-Pressure Monosulfide Solid Solution FexNi1−xS Phases: X-Ray Diffraction Analysis and Raman Spectroscopy

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