Special Group Elements

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Presentation transcript:

Special Group Elements Structure linear Yes Yes D∞h i Linear C∞v No Linear or low symmetry Yes σ Yes Special Group Elements Cs Yes No Ci i Single Element No C1 Yes Ih highly symmetric (octahedral, tetrahedral, icosahedral) Sure? More than one Cn axis of C3 or higher? 6C5 Yes i Icosahedral Yes Yes I No No Yes Oh 3C4 Yes i Octahedral O No No High Symmetry Elements No 3s4 Yes Td No Yes Th i Tetrahedral No T σh Dnh C2  Cn Yes Yes Yes Normal symmetry Yes nσd Dnd Dihedral No No Dn Normal Symmetry Elements (most common) σh Yes Cnh No nσv Yes Cnv Single axis No S2n Yes S2n No Cn