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Lecture_31_Symmetry_Elements

Lecture_31_Symmetry_Elements - Table 12.1 Symmetry Element...

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Unformatted text preview: Table 12.1 Symmetry Element Operations Symbol for Element and Operation Element Operation i Center of symmetry Projection through the (or inversion ' center of symmetry to center) an equal distance on the other side from the center C” Proper rotation axis Counterclockwise rotation, about the Cn axis by 211/11 (or 360°/n), Where n is an ' integer 0‘ Symmetry plane Reflection across the plane of symmetry Sn Improper rotation Counterclockwise rotation axis (also referred about the Sn axis by 217/21 to as a rotation— followed by reflection in a reflection axis or plane perpendicular to the alternating axis) axis (i.e., the combined operation of a Cn rotation followed by reflection across a oh mirror plane) E Identity element The operation that leaves the system unchanged ...
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