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Matsuo Y, Matsukawa Y, Kitakado M, Hasegawa G, Yoshida S, Kubonaka R, Yoshida Y, Kawasaki T, Kobayashi E, Moriyoshi C, Ohno S, Fujita K, Hayashi K, Akamatsu H. Topochemical Synthesis of LiCoF 3 with a High-Temperature LiNbO 3-Type Structure. Inorg Chem 2022; 61:11746-11756. [PMID: 35861755 DOI: 10.1021/acs.inorgchem.2c01439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel perovskite fluoride, LixCoF3, which has an exceptionally low tolerance factor (0.81), has been synthesized via low-temperature lithium intercalation into a distorted ReO3-type fluoride CoF3 using organolithium reagents. Interestingly, this reaction is completed within 15 min at room temperature. Synchrotron X-ray diffractometry and optical second harmonic generation at room temperature have revealed that this compound shows a high-temperature LiNbO3-type structure (space group: R3̅c) involving Li-Co antisite defects and A-site splitting along the c direction. A-site splitting is consistent with the prediction based on hybrid Hartree-Fock density functional theory calculations. Co-L2,3 edge X-ray absorption spectroscopy, as well as bond valence sum analysis, has verified the divalent oxidation state of Co ions in the lithiated phase, suggesting that its composition is close to LiCoF3 (x ≈ 1). This compound exhibits a paramagnetic-to-antiferromagnetic transition at 36 K on cooling, accompanied by weak ferromagnetic ordering. The synthetic route based on low-temperature lithiation of metal fluorides host paves the way for obtaining a new LiNbO3-type fluoride family.
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Affiliation(s)
- Yumi Matsuo
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Yuko Matsukawa
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Masahiro Kitakado
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - George Hasegawa
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Suguru Yoshida
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Ryoto Kubonaka
- Department of Material Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Yuya Yoshida
- Department of Material Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Tatsushi Kawasaki
- Department of Material Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Eiichi Kobayashi
- Kyushu Synchrotron Light Research Center, Tosu, Saga 841-0005, Japan
| | - Chikako Moriyoshi
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Saneyuki Ohno
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Koji Fujita
- Department of Material Chemistry, Kyoto University, Nishikyo, Kyoto 615-8510, Japan
| | - Katsuro Hayashi
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
| | - Hirofumi Akamatsu
- Department of Applied Chemistry, Kyushu University, Motooka, Fukuoka 819-0395, Japan
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