A crystal with a volume of 1 cm3 will contain about 1023 atoms. Lattice theory requires in principle that all of these atoms occupy a regular lattice. The array of atoms must conform to one of the 230 space groups. The equivalent points of a position of a space group must be fully occupied by atoms of the same type. This theoretical model is only achieved conceptually, by an ideal crystal.
KeywordsZinc Graphite Ferrite Cobalt Hexagonal
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