Using Magnet-Embedded Silicone Balls to Construct Stable Models for Close-Packed Crystal Structures

Abstract

This paper demonstrates a model kit comprising a series of silicone balls with magnets embedded in different predesigned configurations, which can be used to construct stable models of close-packed crystal structures. Students in the course of general chemistry lab can use this model kit to construct the four basic packing structures of identical spheres. In addition, this paper gives a detailed introduction to how students can better understand the characteristics of close-packed crystal structures by learning the unique connection configurations between neighboring balls in the kit. The instructiveness of using this model kit is also assessed by summarizing and analyzing the students' opinions from the writing assignments and questionnaire survey.