4.5 Article

Chemical Stability of FeOOH at High Pressure and Temperature, and Oxygen Recycling in Early Earth History**

期刊

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2021, 期 30, 页码 3048-3053

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202100274

关键词

High-pressure chemistry; Iron; Oxygen; Redox chemistry; Structure elucidation

资金

  1. DFG [GRK 2156/1, DU 393/9-2, YBY 101/1-1]

向作者/读者索取更多资源

The study found that goethite decomposes into oxygen-rich fluid and different iron oxides under high-pressure and high-temperature conditions. Goethite, formed from about 3.8 billion years ago until 2.2 billion years ago, was transported into the mantle through plate tectonics.
Goethite, alpha-FeOOH, is a major phase among oxidized iron species, commonly called rust. We studied the behavior of iron (III) oxyhydroxide up to 81 GPa and 2100 K using in situ synchrotron single-crystal X-ray diffraction. At high pressure-temperature conditions FeOOH decomposes forming oxygen-rich fluid and different mixed valence iron oxides (previously known phases of Fe2O3, Fe3O4, Fe5O7, and novel Fe7O10 and Fe6.32O9). Rust is known to form as a byproduct of anoxygenic prokaryote metabolism that took place massively from about 3.8 billion years (Ga) ago until the Great Oxidation Event (GOE) similar to 2.2 Ga ago. Rust was buried on the ocean floor and was transported into the mantle as a consequence of plate tectonics (started similar to 2.8 Ga ago). Our results suggest that recycling of rust in Earth's mantle contributes to redox conditions of the early Earth and formation of oxygen-rich atmosphere.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据