摘要
利用“粒子占有率”概念统整“共有分摊”“无隙并置”和“粒子共同占位”概念,对高中阶段晶体结构的学习有重要意义。利用李国武提供的毓川碳钇矿(Yuchuanite)结构,通过推理分析和理论溯源,得出晶胞中粒子数目因晶胞(框)位置不同而有差异,利用“粒子占有率”概念可更为准确地求算晶胞内粒子数。该结论对高中学生理解晶体结构、求算晶胞内粒子数有一定的指导作用,同时也给出了与之相应的大单元整体教学设计。
Using the concept of “particle occupancy” to integrate the concepts of “common apportionment” “gapless juxtaposition” and “particle common occupancy” is of great significance to the study of crystal structure in senior high school. Using the Yuchuanite structures provided by Li Guowu, it is concluded that the particle numbers in the cell are different due to different cell(frame) positions through inference analysis and theoretical tracing. The particle numbers in the cell can be calculated more accurately by using the concept of “particle occupancy”. This conclusion is helpful for senior high school students to understand the crystal structure and calculate the number of particles in the cell. Meanwhile, the whole teaching design of large unit is also given.
作者
彭文坤
PENG Wen-Kun(College of Education for the Future,Beijing Normal University,Zhuhai 519600,China;Xundian Ethnic Senior High School,Kunming 655200,China)
出处
《化学教育（中英文）》
CAS
北大核心
2024年第15期112-118,共7页
Chinese Journal of Chemical Education
基金
云南省教育科学规划项目“基于化学大概念理解进阶路径的大单元情境教学研究”(项目批准号:BC23101)。
关键词
晶胞
粒子占有率
毓川碳钇矿
教学设计
crystal cell
particle occupancy
Yuchuanite
teaching design
