Character table for the C3h point group

C3h     E       2 C3    sh      2 S3       <R> <p> <—d—> <——f——> <———g———> <————h————> <—————i—————> 
A'        1       1       1       1        ..T ... ....T TT..... ........T ....TT..... TT..........T
A"        1       1      -1      -1        ... ..T ..... ......T ..TT..... ..........T ......TT.....
E'  *     2      -1       2      -1        ... TT. TT... ....TT. TT..TT... TT......TT. ....TT..TT...
E"  *     2      -1      -2       1        TT. ... ..TT. ..TT... ......TT. ..TT..TT... ..TT......TT.

 Symmetry of Rotations and Cartesian products

A'   R+d+2f+g+2h+3i+2j+3k+4l+3m  Rz, z2, x(x2−3y2), y(3x2y2), z4, xz2(x2−3y2), yz2(3x2y2), x2(x2−3y2)2y2(3x2y2)2, xy(x2−3y2)(3x2y2), z6 
A"   p+f+2g+h+2i+3j+2k+3l+4m     z, z3, xz(x2−3y2), yz(3x2y2), z5, xz3(x2−3y2), yz3(3x2y2) 
E'   p+d+f+2g+2h+2i+3j+3k+3l+4m  {x, y}, {x2y2, xy}, {xz2, yz2}, {(x2y2)2−4x2y2, xy(x2y2)}, {z2(x2y2), xyz2}, {x(x2−(5+2√5)y2)(x2−(5−2√5)y2), y((5+2√5)x2y2)((5−2√5)x2y2)}, {xz4, yz4}, {z2((x2y2)2−4x2y2), xyz2(x2y2)}, {z4(x2y2), xyz4} 
E"   R+d+f+g+2h+2i+2j+3k+3l+3m   {Rx, Ry}, {xz, yz}, {z(x2y2), xyz}, {xz3, yz3}, {z((x2y2)2−4x2y2), xyz(x2y2)}, {z3(x2y2), xyz3}, {xz(x2−(5+2√5)y2)(x2−(5−2√5)y2), yz((5+2√5)x2y2)((5−2√5)x2y2)}, {xz5, yz5} 


    α  The order of the C3h point group is 6, and the order of the principal axis (S3) is 6. The group has 4 irreducible representations.

    β  The C3h point group could also be named S3, as it contains the S3 axis as its only symmetry element.
       Another rare designation is C6i because the S3 axis is identical to a roto-inversion axis of order 6.

    γ  The C3h point group is isomorphic to C6 and S6.

    δ  The C3h point group is generated by one single symmetry element, S3. Therefore, it is a cyclic group.
       The canonical choice, however, is to use redundant generators: C3 and σh.

    ε  The lowest nonvanishing multipole moment in C3h is 4 (quadrupole moment).

    ζ  This is an Abelian point group (the commutative law holds between all symmetry operations).
       The C3h group is Abelian because it contains only one symmetry element, all the powers of which necessarily commute (sufficient condition).
       In Abelian groups, all symmetry operations form a class of their own, and all irreducible representations are one-dimensional.

    η  Because the group is Abelian and the maximum order of rotation is >2, some irreducible representations have complex characters.
       These 4 cases have been combined into 2 two-dimensional representations that are no longer irreducible but have real-valued characters.
       Accordingly, 2 pairs of left and right rotations have been combined into one two-membered pseudo-class each.

    θ  The 2 reducible “E” representations almost behave like true irreducible representations.
       Their norm, however, is twice the group order. Therefore, they have been marked with an asterisk in the table.
       This is essential when trying to decompose a reducible representation into “irreducible” ones using the familiar projection formula.

    ι  All characters are integers because the order of the principal axis is 1,2,3,4 or 6.
       This implies that the point group corresponds to a constructible polygon which can be used for tiling the plane.
       Such point groups are also referred to as “crystallographic point groups”, as they are compatible with periodic lattice symmetry.
       There are exactly 32 such groups: C1,Cs,Ci,C2,C2h,C2v,C3,C3h,C3v,C4,C4h,C4v,C6,C6h,C6v,D2,D2d,D2h,D3,D3d,D3h,D4,D4h,D6,D6h,S4,S6,T,Td,Th,O,Oh.

This Character Table for the C3h point group was created by Gernot Katzer.

For other groups and some explanations, see the Main Page.