Crystallographic nomenclature Bravais lattices, crystal classes, space groups

1 Crystallographic nomenclature (Bravais lattices, crystal classes, space groups) The following information is generally included in a usual crystallographic description  

The space lattice of a crystal is a representation of its translation repetition. 

The parallelepiped built upon the three translations selected as unit translations is defined as the unit cell. 

The combination of the point lattices constructed on the basis of the crystallographic systems with the possible centring translation results in the 14 so-called Bravais lattice type, illustrated in Fig. 3.4. Substituting (decorating) each lattice 

Crystal family Symbol Crystal system Crystallographic point groups (crystal classes) Number of space groups Conventional coordinate system Bravais lattices 

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