The reaction of water and other materials has been the central topic under high-pressure physics research,because the Earth,super-Earth,Uranus,Neptune and other planets contain a great amount of water inside.However,t...The reaction of water and other materials has been the central topic under high-pressure physics research,because the Earth,super-Earth,Uranus,Neptune and other planets contain a great amount of water inside.However,the reaction between star-rich MgO and water under ultra-high pressure remains still poorly understood.Here,using ab initio evolutionary structure prediction researches of the structures of MgO-H_(2)O system at 300 GPa-600 GPa,we find that(MgO)2H_(2)O and MgO(H_(2)O)2 could become stable.The(MgO)2H_(2)O compounds may be an important component of super-Earth and the ice-rock boundary of Uranus and Neptune.Furthermore,it may be the reservoir under high pressure before the forming of the Earth’s core or other super-Earths.The current findings could expand our knowledge and improve our understanding of the evolution and composition of planets.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.12204280 and 12147135)the Natural Science Foundation of Shandong Province of China(Grant No.ZR202103010004)the Postdoctoral Science Foundation of China(Grant No.2021M691980).
文摘The reaction of water and other materials has been the central topic under high-pressure physics research,because the Earth,super-Earth,Uranus,Neptune and other planets contain a great amount of water inside.However,the reaction between star-rich MgO and water under ultra-high pressure remains still poorly understood.Here,using ab initio evolutionary structure prediction researches of the structures of MgO-H_(2)O system at 300 GPa-600 GPa,we find that(MgO)2H_(2)O and MgO(H_(2)O)2 could become stable.The(MgO)2H_(2)O compounds may be an important component of super-Earth and the ice-rock boundary of Uranus and Neptune.Furthermore,it may be the reservoir under high pressure before the forming of the Earth’s core or other super-Earths.The current findings could expand our knowledge and improve our understanding of the evolution and composition of planets.
