View in EDS

On the structure of heptalithium distannide: Li7Sn2 or Li7−xSn2 (0.3 < x < 0.5).

Saved in:

Bibliographic Details
Title:	On the structure of heptalithium distannide: Li7Sn2 or Li7−xSn2 (0.3 < x < 0.5).
Authors:	Rahman, Salina, Ghosh, Kowsik, Ovchinnikov, Alexander, Nandakumar, Anirudh, Chan, Candace K., Bobev, Svilen
Source:	Dalton Transactions: An International Journal of Inorganic Chemistry; 9/14/2025, Vol. 54 Issue 34, p12859-12867, 9p
Subject Terms:	CRYSTAL structure, X-ray diffraction, INTERMETALLIC compounds, ORDER-disorder transitions, CHEMICAL bonds, NONSTOICHIOMETRIC compounds
Abstract:	Li–Sn intermetallics are promising candidates for high-capacity Li-ion battery anodes, yet, the precise crystal structures of some "known" binary phases remain unresolved. One such phase, Li7Sn2, originally reported in 1975, is re-examined here using single-crystal X-ray diffraction methods. Its orthorhombic structure (space group Cmmm, no. 65) features isolated Sn atoms and Sn–Sn dumbbells in a matrix of Li atoms. The present study indicates occupational disorder on one of the Li sites in Li7Sn2, meaning that it is a non-stoichiometric phase with revised composition of Li7−xSn2 (0.3 < x < 0.5). In the most extreme case, when the Li atomic site in question is completely empty, the composition becomes Li6.5Sn2 or Li13Sn4. Analysis of the chemical bonding through electronic structure calculations indicates significant covalency of Sn–Sn and Li–Sn interactions. [ABSTRACT FROM AUTHOR]
	Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Complementary Index

Nájsť tento článok vo Web of Science

Be the first to leave a comment!