Structure of nu-Al80.61Cr10.71Fe8.68, a giant hexagonal approximant of a quasicrystal determined by a combination of electron microscopy and X-ray diffraction
文献类型：期刊论文
| 作者 | Mo, ZM ; Zhou, HY ; Kuo, KH |
| 刊名 | ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
 |
| 出版日期 | 2000 |
| 卷号 | 56页码:392 |
| 关键词 | AL-CR-NI RARE-EARTH ALLOYS CRYSTAL-STRUCTURE KAPPA-PHASE QUASI-CRYSTAL TRANSFORMATION CLUSTER MODEL |
| ISSN号 | 0108-7681 |
| 通讯作者 | Kuo, KH (reprint author), Chinese Acad Sci, Inst Phys, Beijing Lab Electron Microscopy, POB 2724, Beijing 100080, Peoples R China. |
| 中文摘要 | nu-Al80.61Cr10.71Fe8.68, P6(3)/m (No. 176), a = 40.68 (7), c = 12.546 (1) Angstrom, V = 17 983 (8) Angstrom(3), atoms/cell = 1184.56, D-x = 3.518 g cm(-3), lambda(Mo K alpha) = 0.71069 Angstrom, mu = 5.032 mm(-1), F(000) = 18 433, T = 293 K, final R = 0.075 for 3854 reflections with F-o > 4 sigma(F-o). The [001] high-resolution electron-microscopic image of the nu-AlCrFe phase clearly shows similar local characteristics to those given by the complex icosahedral cluster found in somewhat smaller hexagonal approximant structures, such as kappa-Al76Cr18Ni6 [a = 17.674 (3), c = 12.516 (3) Angstrom; Sato et al. (1997). Acta Cryst. C53, 1531-1533; Marsh (1998). Acta Cryst. B54, 925-926] and lambda-Al4.32Mn [a = 28.382 (9), c = 12.389 (2) Angstrom; Kreiner & Franzen (1997). J. Alloys Compd. 261, 83-104]. Using the known atomic distribution of this icosahedral cluster in the kappa and lambda phases as the starting point, the structure of the nu phase, a hexagonal intermetallic compound with probably the largest a parameter, was solved by X-ray single-crystal diffraction using direct methods. As in kappa and lambda phases, almost all TM (transition metal) atoms in the complex icosahedral cluster are icosahedrally coordinated. However, contrary to the lambda structure in which about 98% of the TM atoms have icosahedral coordination, the TM atoms in the nu structure also form capped pentagonal prisms in the region between these complex icosahedral clusters, yielding an average icosahedral coordination of about 70% for TM atoms. After rapid solidification, the nu phase occurs together with a decagonal quasicrystal with a periodicity of about 12.5 Angstrom along its tenfold axis and thus also consists of six layers, two flat ones each sandwiched between two puckered layers in mirror reflection, stacked along the c axis. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53596]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Mo, ZM,Zhou, HY,Kuo, KH. Structure of nu-Al80.61Cr10.71Fe8.68, a giant hexagonal approximant of a quasicrystal determined by a combination of electron microscopy and X-ray diffraction[J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE,2000,56:392. |
| APA | Mo, ZM,Zhou, HY,&Kuo, KH.(2000).Structure of nu-Al80.61Cr10.71Fe8.68, a giant hexagonal approximant of a quasicrystal determined by a combination of electron microscopy and X-ray diffraction.ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE,56,392. |
| MLA | Mo, ZM,et al."Structure of nu-Al80.61Cr10.71Fe8.68, a giant hexagonal approximant of a quasicrystal determined by a combination of electron microscopy and X-ray diffraction".ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE 56(2000):392. |
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来源：物理研究所
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