大块钙钛矿MgSiO3和镁方铁矿(Mg,Fe)O的高压合成

 钙钛矿相MgSiO₃和镁方铁矿(Mg,Fe)O作为地球下地幔含量最丰富的候选矿物，其高温高压实验数据通常用来与地震学探测数据做对比，对限定下地幔的真实矿物学组分具有决定性的作用。但天然的钙钛矿相MgSiO₃和镁方铁矿(Mg,Fe)O很难得到，给这两种矿物的高温高压实验研究工作带来不便。介绍了应用活塞圆筒（Piston-Cylinder）压机和大腔体二级压砧（Mutli-Anvil）压机高温高压合成大块钙钛矿相MgSiO₃和不同Fe/Mg比的镁方铁矿(Mg,Fe)O样品的实验技术和实验方法，对所得到的样品进行了微区电子探针、拉曼光谱和X射线衍射分析。所得样品可以作为高压实验特别是冲击压缩实验的初始样品。

Synthesis of Large Bulk MgSiO3 Perovskite and (Mg,Fe)O Ferropericlase at High-Pressure and High-Temperature

MgSiO_3 perovskite and ferropericlase(Mg,Fe)O are generally considered as the most dominant components in the Earth's lower mantle.The experimental data of these phases at high pressures and high temperatures play a key role to constrain the composition of the Earth's lower mantle.However,high pressure experiments at lower mantle conditions,especially the shock wave experiments,are restricted since it is impossible to collect the high-phases of the samples in nature.We introduce the experimental methods to synthesize large bulk MgSiO_3 perovskite and ferropericlase(Mg,Fe)O using piston-cylinder and mutli-anvil apparatuses,and the synthesized samples were analyzed by micro electronic probe,Raman spectrum,and X-Ray diffraction.This makes it possible to do shock wave experiments with the large bulk MgSiO_3 perovskite and ferropericlase(Mg,Fe)O as starting materials.