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Article

Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core

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Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, D-95440 Bayreuth, Germany
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Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany
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Deutsches Elektronen Synchrotron, 22607 Hamburg, Germany
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European Synchrotron Radiation Facility, F-38043 Grenoble, France
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Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Fumagalli Patrizia
Minerals 2021, 11(5), 516; https://doi.org/10.3390/min11050516
Received: 16 April 2021 / Revised: 8 May 2021 / Accepted: 10 May 2021 / Published: 13 May 2021
(This article belongs to the Special Issue Minerals under Extreme Conditions)
We report the high-pressure synthesis and the equation of state (EOS) of a novel nickel carbide (Ni3C). It was synthesized in a diamond anvil cell at 184(5) GPa through a direct reaction of a nickel powder with carbon from the diamond anvils upon heating at 3500 (200) K. Ni3C has the cementite-type structure (Pnma space group, a = 4.519(2) Å, b = 5.801(2) Å, c = 4.009(3) Å), which was solved and refined based on in-situ synchrotron single-crystal X-ray diffraction. The pressure-volume data of Ni3C was obtained on decompression at room temperature and fitted to the 3rd order Burch-Murnaghan equation of state with the following parameters: V0 = 147.7(8) Å3, K0 = 157(10) GPa, and K0′ = 7.8(6). Our results contribute to the understanding of the phase composition and properties of Earth’s outer core. View Full-Text
Keywords: nickel carbide; high pressures; X-ray diffraction; equation of state; Earth’s outer core nickel carbide; high pressures; X-ray diffraction; equation of state; Earth’s outer core
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MDPI and ACS Style

Fedotenko, T.; Khandarkhaeva, S.; Dubrovinsky, L.; Glazyrin, K.; Sedmak, P.; Dubrovinskaia, N. Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core. Minerals 2021, 11, 516. https://doi.org/10.3390/min11050516

AMA Style

Fedotenko T, Khandarkhaeva S, Dubrovinsky L, Glazyrin K, Sedmak P, Dubrovinskaia N. Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core. Minerals. 2021; 11(5):516. https://doi.org/10.3390/min11050516

Chicago/Turabian Style

Fedotenko, Timofey, Saiana Khandarkhaeva, Leonid Dubrovinsky, Konstantin Glazyrin, Pavel Sedmak, and Natalia Dubrovinskaia. 2021. "Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core" Minerals 11, no. 5: 516. https://doi.org/10.3390/min11050516

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