Crystal Geometry. II
In this chapter, we continue our study of crystal geometry by investigating the internal arrangements of crystalline materials. Crystals are characterized by periodicities in three dimensions. An atomic grouping is repeated over and over again by a certain symmetry mechanism so as to build up a crystal, and thus we are led to a consideration of space-group symmetry. A space-group pattern in its simplest form may be considered to be derived by repeating a motif having a crystallographic point-group symmetry by the translations of a lattice, and so it is appropriate to examine lattices next.
KeywordsPoint Group Reciprocal Lattice Equivalent Position Symmetry Element Plane Group
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