17 / 2023-03-21 23:43:13

New phases of hydrates at High Pressure

高压物理与材料科学 > 相变与机制

High pressures will induce new phases compounds, stoichiometry and physical phenomenon at extreme conditions. Hydrates, one of the star materials at high pressure, will show completely different properties from atmosphere with important application prospects in proton transport, nuclear quantum effect, etc. and they are also related to the evolution and behavior of gas giants, ice planets and our mother earth. This report mainly focus on two new compounds of hydrates which are newly predicted at high pressure: 1) [H4O]²⁺ ions form in the HF-H2O system, enhancing the basic understanding of the ionization of water under high pressure and acid-base theory; 2) A new phase of H2O·MgO·MgSiO3 which could exist as water preserver in the first 50-100 million years of Earth’s history and related the origin of sea on the earth.[1]



Reference

[1] Han-Fei Li, Artem R. Oganov , Haixu Cui, Xiang-Feng Zhou, Xiao Dong, and Hui-Tian Wang. Ultrahigh-Pressure Magnesium Hydrosilicates as Reservoirs of Water in Early Earth. Phys. Rev. Lett. 128, 035703 (2022)