Discrete Symmetry Groups
Those discrete groups which play the central role in solid-state physics are the point groups and their extensions (double, colour groups), the translation groups, and the combination of both (the space groups). These groups and the meaning of their elements are discussed in the following sections. Apart from these, the symmetric (permutation) groups are important in physical systems. They are described in Sect. 3.5.
KeywordsHexagonal Rutile Ferro
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