at Google ScholarTitle data
Yuan, Liang ; Steinle-Neumann, Gerd:
Hydrogen distribution between the Earth's inner and outer core.
In: Earth and Planetary Science Letters.
Vol. 609
(2023)
.
- 118084.
ISSN 0012-821X
DOI: https://doi.org/10.1016/j.epsl.2023.118084
Abstract in another language
Hydrogen, the most abundant element in the universe, has likely been incorporated into Earth's core due to its tendency to dissolve in iron at high pressure. Using machine-learning methods to overcome the length- and timescale limitations of quantum mechanical simulations and the difficulties in laboratory experiments, we characterize the phase behavior of superionic FeHx (x denotes nonstoichiometric compositions) in the Earth's core. We show that hexagonal packing of Fe is thermodynamically stable with and without H, and its melting temperature decreases by 700–900 K with 0.34 wt H at the pressure of the inner core boundary. We further predict H partition coefficients between solid and liquid Fe as 0.50(3)–0.62(3), implying 1 and 33 times the mass of H in the ocean in the inner and outer core, respectively, which holds a key promise for H to explain seismic characteristics of the core.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | Earth's core; crystallization differentiation; partitioning; hydrogen budget |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Group Material Sciences > Chair Crystallography |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 530 Physics |
| Date Deposited: | 18 Oct 2024 08:35 |
| Last Modified: | 18 Oct 2024 08:35 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/90749 |