Where are the atoms in quasicrystals? Experimental and theoretical studies of ternary and quaternary approximants

Gordon J. Miller*, Chi-Shen Lee, Wen Jiuan Tsai

*此作品的通信作者

研究成果: Conference article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Problems concerning complete structural characterization of quasicrystals involve locating the atomic positions as well as determining the distribution of elements at each site. Quasicrystalline approximants provide models for potential building units of quasicrystals, but a clear determination of the elemental decorations in such approximants also remains incomplete. We report experimental and theoretical studies of new, quaternary Bergman phases in the Li-Mg-Zn-Al system and a new, quasicrystalline approximant Li10Mg6Zn31Al3 (A16M34-type). A theoretical model using averaged Mulliken populations provides a means to track the segregation of elements (and vacancies) onto different sites as a function of valence electron concentration. As the Li content decreases, vacancies begin to occur at a specific site in the Bergman structure. The new approximant demonstrates how truncated tetrahedra can play an important role in forming clusters with possible fivefold symmetry in quasicrystalline structures.

原文English
期刊Materials Research Society Symposium - Proceedings
643
出版狀態Published - 1 十二月 2001
事件Quasicrystals - Preparations, Properties and Applications - Boston, MA, United States
持續時間: 27 十一月 200030 十一月 2000

指紋

深入研究「Where are the atoms in quasicrystals? Experimental and theoretical studies of ternary and quaternary approximants」主題。共同形成了獨特的指紋。

引用此