Bilbao Crystallographic Server Geometrical interpretation of the symmetry operations of the two-dimensional crystallographic point groups

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Geometrical Interpretation of the Symmetry Operations of the 2D Point Groups

Symbol	Symmetry Operations (in Seitz notation )
1	1
2	1; 2
m	1; m10
2mm	1; 2; m10; m01
4	1; 2; 4+; 4-
4mm	1; 2; 4+; 4-; m10; m01; m1-1; m11
3	1; 3+; 3-
3m1	1; 3+; 3-; m11; m10; m01
31m	1; 3+; 3-; m1-1; m12; m21
6	1; 3+; 3-; 2; 6-; 6+
6mm	1; 3+; 3-; 2; 6-; 6+; m11; m10; m01; m1-1; m12; m21