Theoretical study of the structural and thermodynamic properties of U–He compounds under high pressure

Author:

Cao Ye1ORCID,Song Hongxing1,Yan Xiaozhen1,Wang Hao1,Wang Yufeng1,Wu Fengchao1,Zhang Leilei1,Wu Qiang1,Geng Huayun12

Affiliation:

1. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621900, P. R. China

2. HEDPS, Center for Applied Physics and Technology, and College of Engineering, Peking University, Beijing 100871, P. R. China

Abstract

Besides the helium bubbles in uranium at ambient conditions, helium could exist as He2 dimer and atomic configuration in Fmmm-U4He and P1̅-U6He under high pressure. Both Fmmm-U4He and P1̅-U6He exhibited one-dimensional superionic phase transitions.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

National Safety Academic Fund

Tohoku University

Publisher

Royal Society of Chemistry (RSC)

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