Experimental Determination of P-V-T Equations of State of Earth Materials with Applications to Earth Interior Models

准确确定的地幔和核心物质的压力-体积-温度(P-V-T)状态方程构成了地球内部模型的关键输入。系统地研究了地幔(SiO_2-MgO-CaO-Al_2O_3)和核(Fe-Ni-O-H)材料在高压和高温下的状态方程。P-V-T测量将使用20 Gpa以上的单晶x射线衍射法、20 Gpa的能量色散衍射法、多晶样品的单色高分辨率x射线衍射法和较高(岩心)压力的能量色散衍射法。样品将用外部电阻炉加热，温度控制良好，最高可达900K，以测量高压下的热膨胀。

Accurately determined pressure-volume-temperature (P-V-T) equations of state of mantle and core materials form critical input for models of the Earth's interior. A systematic study of the equations of state of mantle (SiO2-MgO-CaO-A12O3) and core (Fe-Ni-O-H) materials at high pressures and temperatures. P-V-T measurements will be carried out using single-crystal x-ray diffraction methods above 20 GPa, and energy dispersive diffraction methods for 20 GPa, monochromatic high-resolution x-ray diffraction techniques for polycrystalline samples to 150 GPa, and energy dispersive diffraction methods for measurements to higher (core) pressures. Samples will be heated with an external resistance furnace to well controlled temperatures up to 900 K to measure thermal expansion at high pressures.