大学化学 >> 2021, Vol. 36 >> Issue (12): 2101036.doi: 10.3866/PKU.DXHX202101036

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最密堆积中空隙分布的学习技巧

孙宏伟(), 陈兰   

  • 收稿日期:2021-01-20 录用日期:2021-02-18 发布日期:2021-03-15
  • 通讯作者: 孙宏伟 E-mail:sunhw@nankai.edu.cn
  • 作者简介:孙宏伟，Email: sunhw@nankai.edu.cn

Techniques of Learning the Arrangement of the Holes in Close-Packed Structures

Hongwei Sun(), Lan Chen   

  • Received:2021-01-20 Accepted:2021-02-18 Published:2021-03-15
  • Contact: Hongwei Sun E-mail:sunhw@nankai.edu.cn

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摘要：

六方最密堆积和立方最密堆积是金属晶体中最常见的结构，其正四面体空隙和正八面体空隙的分布是学生学习的难点。本文将揭示密置双层–最密堆积–离子晶体结构中空隙的分布规律，进而将典型离子晶体结构与最密堆积中的空隙分布相关联。这对学生掌握空隙分布的规律性，理解金属和离子晶体结构，提升晶体结构的学习效果大有帮助。

关键词: 空隙, 金属晶体, 离子晶体, 密置层, 最密堆积

Abstract:

The hcp and ccp are the two main structures that most metals adopt. The tetrahedral holes and octahedral holes in these structures are commonly difficult for students to grasp. In this paper, we focus on the arrangement of the holes in the close-packed structures. This is also very helpful in learning ionic crystals.

Key words: Hole, Metallic crystal, Ionic crystal, Close-packed layer, Close-packed structure