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Title: Helium-hydrogen immiscibility at high pressures

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5086270· OSTI ID:1524673
ORCiD logo [1];  [1];  [2];  [3];  [4];  [3];  [5]; ORCiD logo [5]; ORCiD logo [6]
  1. Chinese Academy of Sciences (CAS), Hefei (China); Univ. of Science and Technology of China, Hefei (China)
  2. Chinese Academy of Sciences (CAS), Hefei (China)
  3. Carnegie Inst. of Washington, Washington, DC (United States)
  4. Carnegie Inst. of Washington, Washington, DC (United States); Chulalongkorn Univ., Bangkok (Thailand)
  5. Univ. of Chicago, IL (United States)
  6. 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
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (1)

Compression behavior of dense H 2 He mixtures up to 160 GPa journal June 2020