Water in the Earth's core and dynamics of the deep Earth inter ior

氢是地核中最重要的轻元素之一。为了了解氢在地核中的行为及其对地核结构和动力学的影响，需要在高压和高温下对铁氢（Fe-H）体系中的晶体结构、相关系及其性质进行实验研究。在Fe-H系统中，我们开发了一种高压高温生成技术，使用激光加热的金刚石砧细胞，最高可达100 GPa和2000 K。双六边形紧密堆积的铁氢化物（FeH）被观测到高达约100 GPa，这表明FeH在地核中可能是稳定的。

Hydrogen is one of the most important candidates as light elements in the Earth's core. To understand the behavior of hydrogen in the Earth's core and its effect on the structure and dynamics of the core, experimental studies of crystal structures, phase relations, and their properties in iron-hydrogen (Fe-H) system are needed at high pressures and temperatures. In the Fe-H system we developed a high-pressure and high-temperature generation technique up to about 100 GPa and 2000 K using a laser-heated diamond anvil cell. The double hexagonal close-packed of iron hydride (FeH) was observed up to about 100 GPa, which suggests that FeH is possibly stable in the Earth's core.