Determination of the crystal structure of icosahedral Al-Cu-Li.
Determination of the crystal structure of icosahedral Al-Cu-Li.
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二十面体 Al-Cu-Li 晶体结构的测定。
DOI：
10.1103/physrevb.38.1681
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Jan L. de Boer
中科院分区：
文献类型：
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作者：
H. Elswijk;Jeff Th. M. De Hosson;S. Smaalen;Jan L. de Boer
用X射线衍射仪测量了Al-Cu-Li二十面体相单晶的X射线衍射。只有37个对称不等价的反射被发现与非零强度。考虑的结构，边缘长度为0.5039 nm的彭罗斯包装的装饰，进行了改进，以匹配的强度数据。对于Cu或Al占据两个菱面体的顶点和边心位置，以及Li或Al占据长菱形体的两个体对角位置，获得了极好的一致性（RF = 7.0%）。比较了二十面体结构和立方结构。
The x-ray diffraction of a single crystal of the icosahedral phase of Al-Cu-Li has been measured on a diffractometer. Only 37 symmetrically inequivalent reflections were found with nonzero intensity. The structures considered, decorations of the Penrose packing with edge length 0.5039 nm, were refined to match the intensity data. An excellent agreement (RF = 7.0%) is obtained for Cu or Al occupying vertex and edge-center positions of both rhombohedra and Li or Al occupying two body-diagonal sites of the prolate rhombohedron. The icosahedral and cubic structure are compared.