赤铁矿
磁铁矿
歧化
衍射
材料科学
原位
相(物质)
同步加速器
高压
粉末衍射
相变
分析化学(期刊)
矿物学
化学工程
结晶学
地质学
化学
热力学
冶金
催化作用
光学
物理
有机化学
生物化学
色谱法
工程类
作者
Alan B. Woodland,Akio Suzuki,D. Trots,Kevin Klimm,M. Mézouar
出处
期刊:American Mineralogist
[Mineralogical Society of America]
日期:2012-09-24
卷期号:97 (10): 1808-1811
被引量:41
摘要
In situ synchrotron X-ray powder diffraction measurements using a Paris-Edinburgh pressure cell were performed to investigate the nature of the high-pressure breakdown reaction of magnetite (Fe3O4). Refinement of diffraction patterns reveals that magnetite breaks down via a disproportionation reaction to Fe4O5 and hematite (Fe2O3) rather than undergoing an isochemical phase transition. This result, combined with literature data indicates (1) that this reaction occurs at ~9.5-11 GPa and 973-1673 K, and (2) these two phases should recombine at yet higher pressures to produce an h-Fe3O4 phase.
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