Point symmetry

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Symétrie ponctuelle (Fr). Punktsymmetrie (Ge). Simmetria del sito, simmetria puntuale (It). Simetría puntual (Sp).

Definition

The point symmetry of a position is its site symmetry. The point symmetry, or point group, of a lattice is the group of linear mappings (symmetry operations, isometries) that map the vector lattice L onto itself. Those geometric crystal classes to which point symmetries of lattices belong are called holohedries.

See also

  • Chapter 3.2 of International Tables for Crystallography, Volume A, 6th edition