MgSiO3是地球下地幔的主要造岩矿物之一，其高温高压下的物性特征是限定下地幔实际矿物组成的重要依据。然而由于缺乏MgSiO3在高压同时高温（相当于下地幔）条件下的实验测量数据，特别是声速测量数据，目前对于下地幔的具体矿物组成没有统一定论。本项目拟以高压合成的高纯辉石相MgSiO3作为研究对象，借助近年来发展成熟的冲击波高压实验及其诊断技术，在80-140GPa冲击高压同时高温条件下测量状态方程和声速数据。实验获取的声速数据，是对目前深部地幔矿物组成研究的重要补充，对于今后高压实验研究的候选矿物设计，以及最终确定下地幔矿物构成具有基本的参考意义。

MgSiO3 is one of the main rock-forming minerals of the Earth’s lower mantle, which physical property under high pressure and high temperature is important basis for limiting the actual mineral compositions of lower mantle. However, the experimental data of MgSiO3 under high pressure and high temperature (equivalent to the lower mantle condition) is relatively insufficient at present, especially for the data of the sound velocity. It results in no unified conclusion about the mineral composition of the lower mantle. The project intends to take high-purity MgSiO3 enstatite synthesized under high pressure as the research object, measures its equation of state and sound velocity under the shock state of 80 to 140GPa with the recent developed shock wave experimental and diagnostic techniques. The experimental sound velocity data acquired in this project is an important supplement on the current research about the mineral composition of the deep mantle, and it has basis significance for future experimental research to design candidate minerals and ultimately placing tight constraints on the mineral composition of the lower mantle.