S20 | E | S20 | C10 | (S20)3 | C5 | S4 | (C10)3 | (S20)7 | (C5)2 | (S20)9 | C2 | (S20)11 | (C5)3 | (S20)13 | (C10)7 | (S4)3 | (C5)4 | (S20)17 | (C10)9 | (S20)19 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
A | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
B | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 | 1 | -1 |
E1* | 2 | 2cos(π/10) | 2cos(π/5) | 2cos(3π/10) | 2cos(2π/5) | 0 | -2cos(2π/5) | -2cos(3π/10) | -2cos(π/5) | -2cos(π/10) | -2 | -2cos(π/10) | -2cos(π/5) | -2cos(3π/10) | -2cos(2π/5) | 0 | 2cos(2π/5) | 2cos(3π/10) | 2cos(π/5) | 2cos(π/10) |
E2* | 2 | 2cos(π/5) | 2cos(2π/5) | -2cos(2π/5) | -2cos(π/5) | -2 | -2cos(π/5) | -2cos(2π/5) | 2cos(2π/5) | 2cos(π/5) | 2 | 2cos(π/5) | 2cos(2π/5) | -2cos(2π/5) | -2cos(π/5) | -2 | -2cos(π/5) | -2cos(2π/5) | 2cos(2π/5) | 2cos(π/5) |
E3* | 2 | 2cos(3π/10) | -2cos(2π/5) | -2cos(π/10) | -2cos(π/5) | 0 | 2cos(π/5) | 2cos(π/10) | 2cos(2π/5) | -2cos(3π/10) | -2 | -2cos(3π/10) | 2cos(2π/5) | 2cos(π/10) | 2cos(π/5) | 0 | -2cos(π/5) | -2cos(π/10) | -2cos(2π/5) | 2cos(3π/10) |
E4* | 2 | 2cos(2π/5) | -2cos(π/5) | -2cos(π/5) | 2cos(2π/5) | 2 | 2cos(2π/5) | -2cos(π/5) | -2cos(π/5) | 2cos(2π/5) | 2 | 2cos(2π/5) | -2cos(π/5) | -2cos(π/5) | 2cos(2π/5) | 2 | 2cos(2π/5) | -2cos(π/5) | -2cos(π/5) | 2cos(2π/5) |
E5* | 2 | 0 | -2 | 0 | 2 | 0 | -2 | 0 | 2 | 0 | -2 | 0 | 2 | 0 | -2 | 0 | 2 | 0 | -2 | 0 |
E6* | 2 | -2cos(2π/5) | -2cos(π/5) | 2cos(π/5) | 2cos(2π/5) | -2 | 2cos(2π/5) | 2cos(π/5) | -2cos(π/5) | -2cos(2π/5) | 2 | -2cos(2π/5) | -2cos(π/5) | 2cos(π/5) | 2cos(2π/5) | -2 | 2cos(2π/5) | 2cos(π/5) | -2cos(π/5) | -2cos(2π/5) |
E7* | 2 | -2cos(3π/10) | -2cos(2π/5) | 2cos(π/10) | -2cos(π/5) | 0 | 2cos(π/5) | -2cos(π/10) | 2cos(2π/5) | 2cos(3π/10) | -2 | 2cos(3π/10) | 2cos(2π/5) | -2cos(π/10) | 2cos(π/5) | 0 | -2cos(π/5) | 2cos(π/10) | -2cos(2π/5) | -2cos(3π/10) |
E8* | 2 | -2cos(π/5) | 2cos(2π/5) | 2cos(2π/5) | -2cos(π/5) | 2 | -2cos(π/5) | 2cos(2π/5) | 2cos(2π/5) | -2cos(π/5) | 2 | -2cos(π/5) | 2cos(2π/5) | 2cos(2π/5) | -2cos(π/5) | 2 | -2cos(π/5) | 2cos(2π/5) | 2cos(2π/5) | -2cos(π/5) |
E9* | 2 | -2cos(π/10) | 2cos(π/5) | -2cos(3π/10) | 2cos(2π/5) | 0 | -2cos(2π/5) | 2cos(3π/10) | -2cos(π/5) | 2cos(π/10) | -2 | 2cos(π/10) | -2cos(π/5) | 2cos(3π/10) | -2cos(2π/5) | 0 | 2cos(2π/5) | -2cos(3π/10) | 2cos(π/5) | -2cos(π/10) |
Number of symmetry elements | h = 20 |
Number of classes, irreps | n = 20 |
Number of real-valued irreducible representations | n = 11 |
Abelian group | yes |
Optical Isomerism (Chirality) | no |
Polar | no |
Parity | no |