Structure determination of the hexagonal quasicrystal approximant mu '-(al,si)(4)cr by the strong reflections approach
文献类型：期刊论文
| 作者 | He, Z. B.; Zou, X. D.; Hovmoller, S.; Oleynikov, P.; Kuo, K. H. |
| 刊名 | Ultramicroscopy
 |
| 出版日期 | 2007-06-01 |
| 卷号 | 107期号:6-7页码:495-500 |
| 关键词 | Aluminum-based quasicrystals Hexagonal phases Structural model Icosahedral chains |
| ISSN号 | 0304-3991 |
| DOI | 10.1016/j.ultramic.2006.03.012 |
| 通讯作者 | Zou, x. d.(zou@struc.su.se) |
| 英文摘要 | A number of different crystalline phases have been found in at-rich al-cr-si alloys by transmission electron microscopy (tem). among these, the new hexagonal phase mu'-(al,si)(4)cr (a = 2.01 and c = 1.24 nm) often found coexisting with the hexagonal mu-(al,si)(4)cr (a = 1.998 and c = 2.4673 nm, isostructural with mu-al4mn) and also with the hexagonal lambda-(al,si)(4)cr (a = 2.839 and c = 1.239 nm, isostructural with lambda-al4mn). it is evident from their electron diffraction patterns that the structures of these three phases are related. the strong reflections in all three are distributed in a similar way. they all exhibit a pseudo-icosahedral symmetry. the structure factor amplitudes and phases for the strong reflections of the mu' phase could therefore be adopted from those of the lambda phase, according to the strong reflections approach. a structure model of the mu' phase is thus deduced from the known lambda-al4mn.u. mu' consists of chains of 3 + 3 or 4 + 2 interpenetrated icosahedra along the < 100 > directions. similar to the lambda phase, there are two flat layers (f) and four puckered layers (p) in each unit cell of mu', stacked along the c-axis in a sequence of pfp(pfp)' where the (pfp)' block is related to the pfp block by a 63 screw. (c) 2006 elsevier b.v. all rights reserved. |
| WOS关键词 | CR-SI ALLOYS ; PHASE ; SYSTEM |
| WOS研究方向 | Microscopy |
| WOS类目 | Microscopy |
| 语种 | 英语 |
| WOS记录号 | WOS:000245341300008 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373640 |
| 专题 | 物理研究所 |
| 通讯作者 | Zou, X. D. |
| 作者单位 | 1.Stockholm Univ, SE-10691 Stockholm, Sweden 2.Dalian Univ Technol, Dept Mat Technol, Dalian 116024, Peoples R China 3.Chinese Acad Sci, Inst Phys, Beijing Lab Elect Microscopy, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Z. B.,Zou, X. D.,Hovmoller, S.,et al. Structure determination of the hexagonal quasicrystal approximant mu '-(al,si)(4)cr by the strong reflections approach[J]. Ultramicroscopy,2007,107(6-7):495-500. |
| APA | He, Z. B.,Zou, X. D.,Hovmoller, S.,Oleynikov, P.,&Kuo, K. H..(2007).Structure determination of the hexagonal quasicrystal approximant mu '-(al,si)(4)cr by the strong reflections approach.Ultramicroscopy,107(6-7),495-500. |
| MLA | He, Z. B.,et al."Structure determination of the hexagonal quasicrystal approximant mu '-(al,si)(4)cr by the strong reflections approach".Ultramicroscopy 107.6-7(2007):495-500. |
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