Iron hydride formed by the reaction of iron, silicate, and water: Implications for the light element of the Earth's core
Iron hydride formed by the reaction of iron, silicate, and water: Implications for the light element of the Earth's core
复制标题
铁、硅酸盐和水反应形成的氢化铁：对地核轻元素的影响
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
T. Hishinuma
中科院分区：
文献类型：
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作者：
T. Yagi;T. Hishinuma
利用同步辐射对铁、硅酸盐矿物和水的体系进行了现场高压-高温X射线观测，观测压力高达4.9 GPa和1350°C。在550°C以上的温度和2.8 GPa以上的压力下，铁与水反应形成氢化铁和氧化铁。形成的氢化铁的化学组成估计为FeH0.3-FeH0.4。这一结果意味着，如果水与铁和硅酸盐一起包含在原始地球足够深的地方，铁应该转化为氢化铁。由此形成的氢化铁的密度可以解释地核密度不足的大部分原因。这些结果表明，氢很可能是地球核心的组成部分。
In situ high pressure-temperature X-ray observations were made on the system of iron, silicate mineral, and water up to 4.9 GPa and 1350°C using a cubic-anvil high pressure apparatus and synchrotron radiation. Above a pressure of 2.8 GPa at temperatures above 550°C, iron reacts with water to form iron hydride and iron oxide. The chemical composition of the iron hydride formed is estimated to be FeH0.3-FeH0.4. This result implies that if water was contained together with iron and silicates at sufficient depth within the primordial Earth, iron should have transformed into iron hydride. The density of iron hydride thus formed can explain a large portion of the density deficit of the Earth's core. These results show that hydrogen is likely a component of the Earth's core.