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
收藏
页码：98 / 101
页数：4
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