The structure of Y-Al13-xCo4 (x=0.8) analyzed by single crystal X-ray diffraction coupled with anomalous X-ray scattering

被引：9

作者：

Sugiyama, Kazumasa ^{[1
]}

Genba, Michiyo ^{[2
]}

Hiraga, Kenji ^{[1
]}

Waseda, Yoshio ^{[3
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 494卷 / 1-2期

基金：

日本学术振兴会;

关键词：

Y-phase; Al-Co system; Crystal structure; Anomalous; X-ray scattering; Approximant; DECAGONAL QUASI-CRYSTAL; APPROXIMANT; CO4AL13;

D O I：

10.1016/j.jallcom.2009.11.117

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of Y-Al13-xCo4 (x=0.8) has been analyzed by single crystal X-ray diffraction: space group C2/m (No.12), a=17.0525 (20)angstrom, 6=4.1059(6)angstrom, c=7.5047(9)angstrom, beta=116.01(1)degrees. Y- Al13-0.8Co4 is isostructural with a ternary Y-A113-x(Co,Ni)4 and crystallized at the Al-poor region close to Al(13)Co4. The distribution of Co was also confirmed by anomalous X-ray scattering (AXS) at Co K absorption edge. Present analysis revealed the Co distribution at Co(1) and Co(2) sites, only, by suggesting unique pentagonal atomic columns with a period of 4 angstrom different from that observed in Al11Co4. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：98 / 101

页数：4

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