Covalent bonds in AlMnSi icosahedral quasicrystalline approximant

被引：57

作者：

Kirihara, K ^{[1
]}

Nakata, T

Takata, M

Kubota, Y

Nishibori, E

Kimura, K

Sakata, M

机构：

[1] Univ Tokyo, Dept Mat Sci, Tokyo 1138656, Japan

[2] Shimane Univ, Dept Mat Sci, Matsue, Shimane 6908504, Japan

[3] Osaka Womens Univ, Dept Nat Sci, Sakai, Osaka 5900035, Japan

[4] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[5] Univ Tokyo, Dept Adv Mat Sci, Tokyo 1130033, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.85.3468

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electron density distributions were obtained using the maximum entropy method with synchrotron radiation powder data. In the metallic Al12Re, metallic bonding was observed for the icosahedral Al-12 cluster with central Re atom. In the nonmetallic alpha-AlMnSi 1/1 approximant, covalent bonds were found in the electron density distribution of the Mackay icosahedral cluster without central atom. Rather than the Hume-Rothery mechanism, the covalency of Al (Si) icosahedron and that between Al (Si) and Mn atoms is considered to be the origin of the pseudogap and nonmetallic behavior of alpha-AlMnSi.

引用

页码：3468 / 3471

页数：4

共 26 条

[1] ELECTRONIC DISTRIBUTIONS OF AL-MN AND AL-MN-SI ALLOYS [J].