• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Symposium on Quasicrystals held November 30-December 2,1998,Boston,Massachusetts,U.S.A. >Atom clusters in A 2/1 cubic approximant phase for understanding the structures of icosahedral phases
【24h】

Atom clusters in A 2/1 cubic approximant phase for understanding the structures of icosahedral phases

机译：A / 2/1立方近似相中的原子团簇，用于了解二十面体相的结构

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two types of atom clusters found in the #beta#-(AlPdMnSi) cubic phase,referred to as a 2/1 crystalline approximant,with a composition of approximately Al_70Pd_23Mn_6Si_1 which is near to the composition Al_72Pd_20Mn_8 fo the icosahedral phase,are discussed in detail for understanding the strucutre of the Al-Pd-Mn icosahedral phase.A large dodecahedral atom cluster located at the body-centered position cna be divided into 19 atom shells with approximately icosahedral symmetry,and a dodecahedron of the 12th shell internally touches the surface of the cubic unit cell with a lattice constant of 2.0211 nm.At each vertex of the dodecahedron,a small icosahedral atom cluster consisting of 12 Al atoms surroundifng a central Pd atom is located.The deodecahedron is ocnnected to each other by edge-sharing,namely by sharing two small icosahedral atom clusters,along the twofold frotational direction,and ofrms a simple-cubic packing of hte atom cluster in the #beta#-(AlPdMnSi) cubic phase.Another atom cluster located at the origin fills up gaps of the simple-cubic packing of the large dodecahedral atom cluster.
机译：详细讨论了在#beta＃-（AlPdMnSi）立方相中发现的两种类型的原子簇，称为2/1晶体近似，其组成近似为二十面体相，组成接近Al_70Pd_23Mn_6Si_1，接近组成二十面体相Al_72Pd_20Mn_8。为了了解Al-Pd-Mn二十面体相的结构，位于体心位置的一个大型十二面体原子簇被分为19个具有近似二十面体对称性的原子壳，第12壳的十二面体内部接触到表面立方晶胞，晶格常数为2.0211 nm。在十二面体的每个顶点处，都有一个由12个Al原子围绕着一个中心Pd原子组成的小的二十面体原子簇。通过沿两个分数方向共享两个小二十面体原子簇，并在#beta＃-（AlPdMnSi）立方相中提供了一个超立方簇的简单立方堆积。位于原点的m团簇填补了大型十二面体原子团簇的简单立方堆积的间隙。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号