Longjian Xie
Carnegie Postdoctoral Fellow

Longjian Xie

Research Interests

Chemical and thermal evolution of Earth’s interior, Melt properties under high pressure, Ultra-high temperature (>3000 ºC) and high pressure (>40 GPa) generation and measurement in the multi-anvil press


Bayerisches Geoinstitut, University of Bayreuth, Germany, Postdoctoral researcher, 2020

Institute for Planetary Materials, Okayama University, Japan, PhD, 2018

China University of Geosciences at Wuhan, China. Geochemistry, BSc, 2011


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Longjian is a mineral physicist who specializes in investigating the melt properties under high pressure. The properties of deep melts control the chemical and thermal evolution of Earth from the early to present Earth.

During his fellowship, Longjian will develop the technique to extend the pressure range of density measurement of melts by X-ray absorption method to 20 GPa and measure the density of hydrous silicate melts under the conditions of 410 km low-velocity layer (~13.5 GPa.). This study will help to constrain the nature of 410 km low-velocity layer.

Prior to joining the Earth and Planets Laboratory, Longjian completed his PhD at the Institute for Planetary Materials, Okayama University. He received “Student Outstanding Presentation Award  of 2018 JPGU”, “2018 Dean’s Scientific Award of Okayama University”, and “SPRUC2020 Young Scientist Award of SPRUC Users Community”, for his excellent work in developing the boron-doped diamond heater in multi-anvil apparatus and its application in viscosity measurement of silicate melts to lower mantle conditions (to 30 GPa, 3000 ºC). From 2018, he joined Bayerisches Geoinstitut as a postdoctoral researcher. He further developed practical form of boron-doped diamond as a routine heater in multi-anvil press and succeeded in generating ultrahigh P (~50 GPa) and T (~3000 ºC) simultaneously in multi-anvil press by combing boron-doped diamond heater and sintered diamond anvils.