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

Title data

Fedotenko, Timofey ; Khandarkhaeva, Saiana ; Dubrovinsky, Leonid ; Glazyrin, Konstantin ; Sedmak, Pavel ; Dubrovinskaia, Natalia:
Synthesis and Compressibility of Novel Nickel Carbide at Pressures of Earth’s Outer Core.
In: Minerals. Vol. 11 (2021) Issue 5 .
ISSN 2075-163X
DOI: https://doi.org/10.3390/min11050516

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography
Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Professor Materials Physics and Technology at Extreme Conditions > Professor Materials Physics and Technology at Extreme Conditions - Univ.-Prof. Dr. Natalia Doubrovinckaia
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 18 May 2021 11:15
Last Modified: 18 May 2021 11:15
URI: https://eref.uni-bayreuth.de/id/eprint/65237