氦-氢高压不混溶性。

Helium-hydrogen immiscibility at high pressures.

机构信息

Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.

Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA.

出版信息

J Chem Phys. 2019 Mar 21;150(11):114504. doi: 10.1063/1.5086270.

DOI:10.1063/1.5086270

PMID:30901985

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 H-He 1:1 and D-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-H system at extreme P-T conditions.

摘要

氢和氦是宇宙中最丰富的元素，它们构成了气态巨行星的内部。因此，它们在极端条件下的状态方程、相、化学状态和化学反应性是非常有趣的。我们应用拉曼光谱学、肉眼观察和同步加速器 X 射线衍射在金刚石压腔中对 H-He 1:1 和 D-He 1:10 压缩气体混合物进行了实验，在 300 K 下达到 100 GPa。通过与纯块状材料的可用数据进行比较，我们没有发现混溶性、化学反应性和新化合物形成的迹象。这一结果为未来在极端 P-T 条件下研究 He-H 体系中的混溶性奠定了新的基础。