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タイトル: | Potassium-rich antiperovskites K₃HTe and K₃FTe and their structural relation to lithium and sodium counterparts |
著者: | Okada, Koji Fujii, Susumu Tassel, Cédric ![]() ![]() ![]() Gao, Shenghan Ubukata, Hiroki Pan, Wenli Yamamoto, Kentaro Uchimoto, Yoshiharu ![]() ![]() ![]() Kuwabara, Akihide Kageyama, Hiroshi ![]() ![]() |
著者名の別形: | 岡田, 鴻志 高, 勝寒 生方, 宏樹 山本, 健太郎 内本, 喜晴 陰山, 洋 |
発行日: | 14-Jul-2023 |
出版者: | Royal Society of Chemistry (RSC) |
誌名: | Dalton Transactions |
巻: | 52 |
号: | 26 |
開始ページ: | 9026 |
終了ページ: | 9031 |
抄録: | Unlike perovskite oxides, antiperovskites M₃HCh and M₃FCh (M = Li, Na; Ch = S, Se, Te) mostly retain their ideal cubic structure over a wide range of compositions owing to anionic size flexibility and low-energy phonon modes that promote their ionic conductivity. In this study, we show the synthesis of potassium-based antiperovskites K₃HTe and K₃FTe and discuss the structural features in comparison with lithium and sodium analogues. It is shown experimentally and theoretically that both compounds maintain a cubic symmetry and can be prepared at ambient pressure, in contrast to most of the reported M₃HCh and M₃FCh which require high pressure synthesis. A systematic comparison of a series of cubic M₃HTe and M₃FTe (M = Li, Na, K) revealed that telluride anions contract in the order of K, Na, Li, with a pronounced contraction in the Li system. This result can be understood in terms of the difference in charge density of alkali metal ions as well as the size flexibility of Ch anions, contributing to the stability of the cubic symmetry. |
著作権等: | © The Royal Society of Chemistry 2023 This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. |
URI: | http://hdl.handle.net/2433/287124 |
DOI(出版社版): | 10.1039/d3dt01039b |
PubMed ID: | 37334563 |
出現コレクション: | 学術雑誌掲載論文等 |
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