Koley Biplab, Thimmaiah Srinivasa, Lidin Sven, Jana Partha P
Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Department of Chemistry, Iowa State University, and Ames Laboratory, U.S. Department of Energy, Iowa 50011, USA.
Acta Crystallogr B Struct Sci Cryst Eng Mater. 2020 Dec 1;76(Pt 6):1109-1116. doi: 10.1107/S205252062001327X. Epub 2020 Nov 18.
γ-AuZn in the Au-Zn binary system has been synthesized and its structure analyzed by single-crystal X-ray diffraction. It crystallizes in the trigonal space group P31m (No. 157) with ∼227 atoms per unit cell and represents a \surd3a × \surd3a × c superstructure of rhombohedrally distorted γ-AuZn. The structure is largely tetrahedrally closed packed. The formation of γ-AuZn can be understood within the framework of a Hume-Rothery stabilization mechanism with a valence electron concentration of 1.68 e/a (valence electrons per atom).
在金-锌二元体系中合成了γ-AuZn，并通过单晶X射线衍射分析了其结构。它以三方空间群P31m（编号157）结晶，每个晶胞约有227个原子，是菱形畸变的γ-AuZn的(\sqrt{3}a×\sqrt{3}a×c)超结构。该结构主要是四面体密堆积。γ-AuZn的形成可以在休姆-罗瑟里稳定机制的框架内理解，其价电子浓度为1.68 e/a（每个原子的价电子数）。
