Categorisation of point groups by symmetry operations
This table lists point group symmetries along with their symmetry operations, the order of the group (i.e. the number of symmetry operations) and common notations. links to a correlation table, and links to tables of products of irreducible representations. The group produced by combination with inversion is listed under "x i". This, in the case of crystolographic point groups, is the Laue class which corresponds to the symmetry of reciprocal space. Isomorphic groups are also listed where character tables are available.
|E, C2||2||C2||2||2||C2h||Cs, Ci|
|E, h||2||Cs (C1h)||m||m||C2h||C2, Ci|
|E, C2, i, h||4||C2h||2/m||C2h||D2, C2v|
Monoclinic symmetry for defects in crystals is often divided into
Type I: C2 coincides with <110> or h with (110)
Type II: C2 coincides with <100> or h with (100)