Helium-hydrogen immiscibility at high pressures
- Chinese Academy of Sciences (CAS), Hefei (China); Univ. of Science and Technology of China, Hefei (China)
- Chinese Academy of Sciences (CAS), Hefei (China)
- Carnegie Inst. of Washington, Washington, DC (United States)
- Carnegie Inst. of Washington, Washington, DC (United States); Chulalongkorn Univ., Bangkok (Thailand)
- Univ. of Chicago, IL (United States)
- Chinese Academy of Sciences (CAS), Hefei (China); Univ. of Science and Technology of China, Hefei (China); Carnegie Inst. of Washington, Washington, DC (United States)
Hydrogen and helium are the most abundant elements in the universe, and they constitute the interiors of gas giant planets. As such, 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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- National Science Foundation (NSF); US Army Research Office (ARO); Deep Carbon Observatory; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS); Recruitment Program of Foreign Experts; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- Grant/Contract Number:
- 11504382; 21473211; 11674330; 51727806; YZ201524; 2011T2J20; FG02-94ER14466; AC02-06CH11357
- OSTI ID:
- 1524673
- Journal Information:
- Journal of Chemical Physics, Vol. 150, Issue 11; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Web of Science
Compression behavior of dense mixtures up to 160 GPa
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journal | June 2020 |
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