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Description:

Ni is the second most abundant element in the Earth’s core. The melting temperature of Ni is shown to be 700 to 800 K higher than that of Fe at 323 to 360 GPa. hcp, bcc, and liquid phase relations differ for Fe and Ni. Ni can be a bcc stabilizer for Fe at high temperatures and inner core pressures. A small amount of Ni can accelerate Fe’s crystallization at core pressures. These results suggest that Ni may substantially impact the structure and formation process of the solid inner core.

Rights:

• http://arxiv.org/licenses/nonexclusive-distrib/1.0/
  

Keyword: Earth’s inner core

Date published: 2024-01-23

Publisher: Proceedings of the National Academy of Sciences

Journal:

• Proceedings of the National Academy of Sciences (ISSN: 10916490) vol. 121 issue. 4 e2316477121

Funding:

• U.S. Department of Energy DE-SC0019759
• National Science Foundation EAR-1918134
• National Science Foundation EAR-1918126
• MEXT | Japan Society for the Promotion of Science JP21K14656

Manuscript type: Author's original (Submitted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1073/pnas.2316477121

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Updated at: 2024-12-24 13:58:20 +0900

Published on MDR: 2024-12-24 13:58:20 +0900