XPS identification of bulk hole defects and itinerant Fe 3d electrons in natural troilite (FeS)
XPS identification of bulk hole defects and itinerant Fe 3d electrons in natural troilite (FeS)
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DOI：
10.1016/j.gca.2003.11.026
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发表时间：
2004-05
影响因子：
5
通讯作者：
W. Skinner;H. Nesbitt;A. Pratt
中科院分区：
文献类型：
--
作者：
W. Skinner;H. Nesbitt;A. Pratt
用X射线光电子能谱(XPS)对真空裂解单斜磁黄铁矿和硫铁矿进行了测量，结果表明这两种矿物的硫配位(S 2p)和铁电子态(Fe2p)的差异是由于铁晶格占位的结果。在铁闪锌矿的Fe2p谱中观察到类似金属的Fe状态，这是由于在矿物结构的限制下，增加了Fe晶位的占有率和增加了Fe-Fe 3D轨道相互作用。XPS测量证实了硫铁矿价带顶部附近的附加电子布居。这些结果为天然铁硫化物中的巡回3d电子提供了全面的实验证据。
XPS measurements have been made of vacuum-fractured monoclinic pyrrhotite and troilite that highlight sulfur coordination (S 2p) and iron electronic state (Fe 2p) differences between these two minerals as a result of iron lattice site occupancy. Metal-like Fe states are observed in the Fe 2p spectrum of troilite due to increased occupancy of Fe lattice sites and increased Fe-Fe 3d orbital interaction within the constraints of the mineral structure. Additional electron population near the top of the troilite valence band is confirmed by XPS measurement. These results provide comprehensive experimental evidence for itinerent 3d electrons in the natural iron sulfides.