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.

氢是地核中最重要的轻元素之一。为了了解地核中氢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）系统中的晶体结构、相关系及其性质进行实验研究。在 Fe-H 系统中，我们使用激光加热金刚石砧室开发了高达约 100 GPa 和 2000 K 的高压高温生成技术。在高达约 100 GPa 的压力下观察到双六方密排氢化铁 (FeH)，这表明 FeH 在地核中可能是稳定的。