Point Defects and the Energy Band Model

Even though we have made considerable effort to explore the reciprocal lattice because it allows us to determine the actual location of the bonding electrons in any given three-dimensional lattice, it should be clear that the electron-band model is easier to understand and easier to use than the Reciprocal lattice band model. To date in this discussion, we have covered  

If we apply rotational symmetry factors to these, we then obtain the 32 Point Groups. Local atom-symmetry then generates the total of 231 Space Groups. 

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