title: Structural Phase Transition of ThC Under High Pressure.
abstract: Thorium monocarbide (ThC) as a potential fuel for next generation nuclear reactor has been subjected to its structural stability investigation under high pressure, and so far no one reported the observation of structure phase transition induced by pressure. Here, utilizing the synchrotron X-ray diffraction technique, we for the first time, experimentally revealed the phase transition of ThC from B1 to P4/nmm at pressure of ~58 GPa at ambient temperature. A volume collapse of 10.2% was estimated during the phase transition. A modulus of 147 GPa for ThC at ambient pressure was obtained and the stoichiometry was attributed to the discrepancy of this value to the previous reports.
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Cun
authors.initials: C
authors.lastname: Yu
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Lin
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Huai
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.|Department of Physics, East China Normal University, Shanghai, 200241, China.
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of Physics, East China Normal University, Shanghai, 200241, China.
authors.forename: Xuezhi
authors.initials: X
authors.lastname: Ke
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Xiaohe
authors.initials: X
authors.lastname: Yu
authors.affiliation: Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201204, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Yang
authors.affiliation: Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, 201203, P. R. China.
authors.forename: Nana
authors.initials: N
authors.lastname: Li
authors.affiliation: Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, 201203, P. R. China.|High Pressure Synergetic Consortium (HPSynC), Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois, 60439, USA.
authors.forename: Wenge
authors.initials: W
authors.lastname: Yang
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Baoxing
authors.initials: B
authors.lastname: Sun
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China. xieruobing@sinap.ac.cn.
authors.forename: Ruobing
authors.initials: R
authors.lastname: Xie
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai, 201800, China.
authors.forename: Hongjie
authors.initials: H
authors.lastname: Xu