| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Novel rubidium polyfluorides with F3, F4, and F5 species |
| Ziyue Lin(林子越), Hongyu Yu(于洪雨), Hao Song(宋昊), Zihan Zhang(张子涵), Tianxiao Liang(梁天笑), Mingyang Du(杜明阳), and Defang Duan(段德芳)† |
| State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China |
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Abstract Pressure has an important effect on chemical bonds and their chemical properties. The atypical compounds NaCl3 and CsF3 are predicted to be stable at high pressure and show unique physical and chemical properties. By using ab initio random structure searching and density functional theory calculations, we predicted multiple thermodynamically stable atypical compounds, which are RbF2, RbF3, RbF4, and RbF5 in the pressure range of 0-300 GPa. In these stable compounds, homonuclear bondings of F3, F4, and F5 species are easily formed. The electron structure calculation showed that except for Fd-3m phase of RbF2, these stable compounds are insulators and F 5p orbitals play an important role in the Fermi level. It is interesting that the compounds RbF5 could be stable at nearly ambient pressure and 0 K which will stimulate experimental studies in the future.
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Received: 19 February 2021
Revised: 14 March 2021
Accepted manuscript online: 18 March 2021
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PACS:
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61.50.Ks
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(Crystallographic aspects of phase transformations; pressure effects)
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71.20.-b
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(Electron density of states and band structure of crystalline solids)
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82.33.Pt
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(Solid state chemistry)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11674122). |
Corresponding Authors:
Defang Duan
E-mail: duandf@jlu.edu.cn
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Cite this article:
Ziyue Lin(林子越), Hongyu Yu(于洪雨), Hao Song(宋昊), Zihan Zhang(张子涵), Tianxiao Liang(梁天笑), Mingyang Du(杜明阳), and Defang Duan(段德芳) Novel rubidium polyfluorides with F3, F4, and F5 species 2021 Chin. Phys. B 30 066102
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