2017 Fiscal Year Final Research Report
Structure analysis of icosahedral quasicrystals containing rare-earth elements and related complex metallic alloys
| Project/Area Number |
15K04659
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Crystal engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 準結晶 / 非周期結晶構造解析 / 正20面体準結晶 / Tsai型クラスター / フェイゾン / 結晶評価 / 結晶工学 |
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| Outline of Final Research Achievements |
In this project, experimental and theoretical investigations have been conducted focusing on icosahedral quasicrystals containing rare-earth elements, in order to gain structural knowledge about unsolved Tsai-type icosahedral quasicrystals. Several icosahedral quasicrystal structures, which include R-Cd(R=Gd,Dy,Tm), Yb-Cd-Mg, and Sc-Zn icosahedral quasicrystls, have been determined by means of single-crystal X-ray diffraction. In addition, it has been revealed that a substantial amount of diffuse scattering with anisotropic distribution, located around the strong Bragg peaks, observed in Sc-Zn icosahedral quasicrystls can be fully interpreted as resulting from phason fluctuations associated with the chemical disorder of Sc sites form an absolute measurement of diffuse X-ray scattering.
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| Free Research Field |
非周期結晶構造解析
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