Stability of the Infinite Layer Structure with Iron Square Planar Coordination
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- 作者：Cé ; dric Tassel ; Takashi Watanabe ; Yoshihiro Tsujimoto ; Naoaki Hayashi ; Atsushi Kitada ; Yuji Sumida ; Takafumi Yamamoto ; Hiroshi Kageyama ; Mikio Takano ; Kazuyoshi Yoshimura
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：March 26, 2008
- 年：2008
- 卷：130
- 期：12
- 页码：3764 - 3765
- 全文大小：80K
- 年卷期：v.130,no.12(March 26, 2008)
- ISSN：1520-5126
文摘
The recently discovered SrFeO2 prepared by a soft chemical route from a precursor SrFeO3 has the "infinite layer" (IL) structure with an unprecedented FeO4 square-planar coordination. We show that the IL structure has significant solubility to yield Sr1-xCaxFeO2 (0 
x 1) and is thermally stable (at least as high as 1000 K for SrFeO2). These results demonstrate that the IL structure, once it is formed at low temperatures, is surprisingly robust owing to the extremely covalent nature of the Fe-O bond, thereby opening a door to chemical tuning of properties and to possible high-temperature applications.
x 1) and is thermally stable (at least as high as 1000 K for SrFeO2). These results demonstrate that the IL structure, once it is formed at low temperatures, is surprisingly robust owing to the extremely covalent nature of the Fe-O bond, thereby opening a door to chemical tuning of properties and to possible high-temperature applications.