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

地核中的水和地球内部深处的动力学

• 批准号: 21740383
• 负责人: HIRAO Naohisa
• 金额: $ 2.83万
• 依托单位: Japan Synchrotron Radiation Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740383/
• 关键词: 地球・惑星内部構造; 地球核; 高温高圧; 放射光; 金属水素化物; 金属物性; X線回折; 鉄水素化物; 地球惑星内部構造; 超高圧

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.

作为地球核心中的光元素，氢是最重要的候选者之一。为了了解氢在地球核心中的行为及其对核心结构和动力学的影响，在高压和温度下需要在高压和温度下进行晶体结构，相位关系及其特性的实验研究。在FE-H系统中，我们使用激光加热的钻石砧细胞开发了一种高压和高温生成技术，达到约100 GPA和2000 K。观察到大约100 GPA的双六角六角封闭，这表明FEH在地球核心中可能是稳定的。