Point Groups

In this chapter, we introduce point groups, which are of great importance in solid-state physics. We start with the general definition of point groups in Sect. 3.1, followed by an exploration of the so-called point groups of the first kind in Sect. 3.2. In Sect. 3.3, we investigate the types of point groups that can occur in solid-state physics before introducing the second kind of point groups in Sect. 3.4.