Sound velocity and elastic properties of Fe–Ni–S–Si liquid: the effects of pressure and multiple light elements

IF 1.2 4区 地球科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Physics and Chemistry of Minerals Pub Date : 2023-07-01 DOI:10.1007/s00269-023-01243-8
Iori Yamada, Hidenori Terasaki, Satoru Urakawa, Tadashi Kondo, Akihiko Machida, Yoshinori Tange, Yuji Higo
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Abstract

Fe–Ni–S–Si alloy is considered to be one of the plausible candidates of Mercury core material. Elastic properties of Fe–Ni–S–Si liquid are important to reveal the density profile of the Mercury core. In this study, we measured the P-wave velocity (VP) of Fe–Ni–S–Si (Fe73Ni10S10Si7, Fe72Ni10S5Si13, and Fe67Ni10S10Si13) liquids up to 17 GPa and 2000 K to study the effects of pressure, temperature, and multiple light elements (S and Si) on the VP and elastic properties.

The VP of Fe–Ni–S–Si liquids are less sensitive to temperature. The effect of pressure on the VP are close to that of liquid Fe and smaller than those of Fe–Ni–S and Fe–Ni–Si liquids. Obtained elastic properties are KS0 = 99.1(9.4) GPa, KS = 3.8(0.1) and ρ0 =6.48 g/cm3 for S-rich Fe73Ni10S10Si7 liquid and KS0 = 112.1(1.5) GPa, KS’ = 4.0(0.1) and ρ0=6.64 g/cm3 for Si-rich Fe72Ni10S5Si13 liquid. The VP of Fe–Ni–S–Si liquids locate in between those of Fe–Ni–S and Fe–Ni–Si liquids. This suggests that the effect of multiple light element (S and Si) on the VP is suppressed and cancel out the effects of single light elements (S and Si) on the VP. The effect of composition on the EOS in the Fe–Ni–S–Si system is indispensable to estimate the core composition combined with the geodesy data of upcoming Mercury mission.

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Fe-Ni-S-Si液体声速和弹性性能:压力和多个轻元素的影响
Fe-Ni-S-Si合金被认为是可能的汞芯材料之一。Fe-Ni-S-Si液体的弹性特性对揭示水星核心的密度分布具有重要意义。在本研究中,我们测量了Fe-Ni-S-Si (Fe73Ni10S10Si7, Fe72Ni10S5Si13和Fe67Ni10S10Si13)液体在17gpa和2000k下的纵波速度(VP),以研究压力、温度和多种轻元素(S和Si)对VP和弹性性能的影响。Fe-Ni-S-Si液体的VP对温度不太敏感。压力对VP的影响接近于Fe液体,小于Fe - ni - s和Fe - ni - si液体。得到的弹性性能为富s Fe73Ni10S10Si7液体KS0 = 99.1(9.4) GPa, KS′= 3.8(0.1),ρ0= 6.48 g/cm3;富si Fe72Ni10S5Si13液体KS0 = 112.1(1.5) GPa, KS′= 4.0(0.1),ρ0=6.64 g/cm3。Fe-Ni-S - si液体的VP介于Fe-Ni-S和Fe-Ni-Si液体之间。这表明多光元素(S和Si)对VP的影响被抑制,抵消了单光元素(S和Si)对VP的影响。结合即将到来的水星任务的大地测量数据,估算核心成分对Fe-Ni-S-Si系统中EOS的影响是必不可少的。
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来源期刊
Physics and Chemistry of Minerals
Physics and Chemistry of Minerals 地学-材料科学:综合
CiteScore
2.90
自引率
14.30%
发文量
43
审稿时长
3 months
期刊介绍: Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are: -Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.) -General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.) -Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.) -Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.) -Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems -Electron microscopy in support of physical and chemical studies -Computational methods in the study of the structure and properties of minerals -Mineral surfaces (experimental methods, structure and properties)
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