Year: 2019
Type: article
Abstract: Hydrogen and helium are the most abundant elements in the universe, and they constitute the interiors of gas giant planets. Thus, their equations of states, phase, chemical state, and chemical reactivity at extreme conditions are of great interest. Applying Raman spectroscopy, visual observation, and synchrotron X-ray diffraction in diamond anvil cells, we performed experiments on H2–He 1:1 and D2–He 1:10 compressed gas mixtures up to 100 GPa at 300 K. By comparing with the available data on pure bulk materials, we find no sign of miscibility, chemical reactivity, and new compound formation. This result establishes a new baseline for future investigations of miscibility in the He–H2 system at extreme P-T conditions.
Source: The Journal of Chemical Physics
DOI: 10.1063/1.5086270
Authors: Yu Wang, Xiao Zhang, Shuqing Jiang, Zachary M. Geballe, Teerachote Pakornchote, Maddury Somayazulu, Vitali B. Prakapenka, Eran Greenberg, Alexander F. Goncharov
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2894479175