Metastable water at several compression rates and its freezing kinetics into ice VII

Pépin, Charles M.; André, Ramesh; Occelli, Florent; Dembele, Florian; Mozzanica, Aldo; Hinger, Viktoria; Levantino, Matteo; Loubeyre, Paul

doi:10.1038/s41467-024-52576-z

Cited by 2 publications

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

H2−CH4 van der Waals compounds under rapid compression

Yan,

Osmond,

Howie

et al. 2024

Phys. Rev. B

View full text Add to dashboard Cite

Under high pressure, methane and hydrogen form (CH4)2H2, CH4(H2)2, and (CH4)3(H2)25 van der Waals compounds with stoichiometries determined by the H2 concentration. This study investigates the effect of compression rates (up to 183 GPa/s) on the formation and morphology of these compounds at pressures up to 60 GPa utilizing dynamic diamond anvil cells combined with time-resolved Raman spectroscopy. Compression rates exceeding 100 GPa/s inhibit the formation of (CH4)3(H2)25, while CH4(H2)2 and (CH4)2H2 remain unaffected. Furthermore, lower compression rates yield distinct leaflike and globular sample morphologies depending on the H2 concentration, while rates above 20 GPa/s consistently result in textureless mixtures, regardless of H2 concentration. These combined results demonstrate the competition between transition time and kinetic barriers, together with the critical role of the compression rate during dynamic-pressure nonequilibrium processes. Published by the American Physical Society 2024

show abstract

H2−CH4 van der Waals compounds under rapid compression

Yan,

Osmond,

Howie

et al. 2024

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

Multiple freezing–melting pathways of high-density ice at room temperature

Lee,

Kim

et al. 2024

Preprint

View full text Add to dashboard Cite

Various metastable ice phases and their complicated transition pathways have been found by pressurization at low temperatures, where slow kinetics and high metastability can be easily achieved. In contrast, such diversity is less expected at room or elevated temperatures. Here, using a dynamic diamond anvil cell and X-ray free electron laser techniques, we demonstrate that supercompressed water transforms into ice VI through multiple freezing–melting pathways at room temperature, hidden within the pressure region of ice VI. The multiple transition pathways occur via a new metastable ice and a metastable ice VII in the supercompressed water. We found that the structural evolution of supercompressed water from high density to very high density underlies the multiple transition pathways. These findings provide new insights to find more metastable ice phases and their transition pathways at room or elevated temperatures on icy planets.

show abstract

Metastable water at several compression rates and its freezing kinetics into ice VII

Cited by 2 publications

References 38 publications

H2−CH4 van der Waals compounds under rapid compression

H2−CH4 van der Waals compounds under rapid compression

Multiple freezing–melting pathways of high-density ice at room temperature

Contact Info

Product

Resources

About