The Hugoniot curve and sound velocity of forsterite to 1200 GPa  

作　　者：Jian Song Liang Sun Huan Zhang Xiaoxi Duan Zanyang Guan Lu Zhang Xiaokang Feng Weiming Yang Hao Liu Mengsheng Yang Yulong Li Dong Yang Zhebin Wang Jiamin Yang Wenge Yang Toshimori Sekine Youjun Zhang Zongqing Zhao Zhongqing Wu 

机构地区：[1]Laboratory of Seismic and Physics of Earth’s Interior,School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [2]National Key Laboratory of Plasma Physics,Laser Fusion Research Center(LFRC),Chinese Academy of Engineering Physics,Mianyang 621900,China [3]Center for High Pressure Science and Technology Advanced Research(HPSTAR),Shanghai 201203,China [4]Graduate School of Engineering,Osaka University,Suita,Japan [5]Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments(MFree),Shanghai Advanced Research in Physical Sciences(SHARPS),Pudong,Shanghai 201203,China [6]Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China [7]National Geophysical Observatory at Mengcheng,University of Science and Technology of China,Hefei 230026,China [8]CAS Center for Excellence in Comparative Planetology,University of Science and Technology of China,Hefei 230026,China

出　　处：《Geoscience Frontiers》2025年第1期313-320,共8页地学前缘(英文版)

基　　金：the financial support from the Natural Science Foundation of China(41925017);Toshimori Sekine acknowledges the financial support from Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments,China(No.22dz2260800);Shanghai Science and Technology Committee,China(No.22JC1410300);the financial support from the Sichuan Science and Technology Program(No.2023NSFSC1910).

摘　　要：The comprehension of the composition and physical state of the deep interiors of large planets,as well as the impact events pertinent to planetary formation and evolution,necessitates an understanding of the properties of planetary materials under extreme conditions.Forsterite(Mg2SiO4),a significant geological mineral,has not been fully characterized in terms of its behavior under shock compression due to a lack of consensus among previous experiments and simulations aimed at determining its Hugoniot,as well as the absence of knowledge of sound velocity at high pressures,a critical parameter indicative of phase transformation and melting.In this study,we delineated the Hugoniot curve of the mineral forsterite up to immense pressures of 1200 GPa.For the first time,we successfully constrained its sound velocity along the Hugoniot curve up to 760 GPa by combining laser-driven shock experiments with first-principles molecular dynamics simulations.The measured Hugoniot data for forsterite corroborated previous findings and suggested the occurrence of incongruent melting during shock compression.Remarkably,along their respective Hugoniot curves,the sound velocity of forsterite was observed to fall between that of the minerals bridgmanite and periclase.The remarkable agreement between the experimental results and simulation data provides reliable sound velocity measurements on the forsterite Hugoniot,which is critical for comprehensively understanding the phase transition and melting behavior of forsterite under ultra-high pressures.This knowledge sheds invaluable light on the behavior of this significant geological mineral under extreme conditions akin to those found in the interiors of planets.

关 键 词：FORSTERITE HUGONIOT Sound velocity First-principles molecular dynamics Shock compression Lateral release 

分 类 号：TN2[电子电信—物理电子学]