New Cage-Like Cerium Trihydride Stabilized at Ambient Conditions  

作　　者：Xin Li Xiaoli Huang Wuhao Chen Di Zhou Hui Xie Quan Zhuang Defang Duan Tian Cui 

机构地区：[1]State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012 [2]Synergetic Extreme Condition User Facility,Jilin University,Changchun 130012 [3]School of Physical Science and Technology,Ningbo University,Ningbo 315211

出　　处：《CCS Chemistry》2022年第3期825-831,共7页中国化学会会刊（英文）

基　　金：supported by the National Key R&D Program of China(no.2018YFA0305900);National Natural Science Foundation of China(nos.11974133,516320025,and 51720105007);Program for Changjiang Scholars,Innovative Research Team in University(no.IRT_15R23);China Postdoctoral Science Foundation(no.2020M670835).

摘　　要：Metal hydrides,generally formed by high pressure combined with high-temperature conditions,have attracted substantial interest due to their promising high-energy density and high-temperature superconductivity.Although the synthesis and properties of these hydrides have been extensively studied,an important challenge is the lack of an efficient method to retain high-pressure phases.Herein,we have successfully quenched a high-pressure phase to ambient conditions with the precise control of different compression pathways.A newβ-CeH_(3) phase(space group Pm3n)isostructural toβ-UH_(3) phase was synthesized by the reaction of Ce and H2 above 33.0 GPa in a laser-heated diamond anvil cell.Theβ-CeH_(3)phase has a cage-like framework structure that can be retained at ambient conditions.The electrical resistance as a function of temperature determines its metallic properties,but no superconductivity is observed in the current temperature range.Thermodynamic and dynamic calculations further prove the stability ofβ-CeH_(3) at ambient pressure.This work demonstrates that different synthesized paths will drive the formation of different products.

关 键 词：high pressure compression pathway hydrides crystal structure X-ray diffraction 

分 类 号：TG14[一般工业技术—材料科学与工程]