晶体结构的分析和计算是高中化学的难点,它能很好的考查学生的观察能力和三维想象能力,而且又很容易与数学、物理特别是立体几何知识相结合,自然也就成为高考选考内容的热点.此类题目,考查的焦点主要集中在化学式、配位数、晶体密度或晶胞边长等内容,关键在于求出每个晶胞中所含粒子的数目,我们只有在熟练掌握NaCl等典型结构的基础上,理解和 Crystal structure analysis and calculation of high school chemistry is difficult, it can be a good test of students’ ability to observe and three-dimensional imagination, and it is easy and mathematics, physics, especially the combination of three-dimensional geometric knowledge, naturally became the entrance examination The focus of such topics, the focus of examination focused on the chemical formula, coordination number, crystal density or cell length and other elements, the key is to find out the number of particles contained in each unit cell, we only master NaCl and other typical structures on the basis of understanding and