Reduction formula for point group Ci

Your representation

E i
54 0

can be reduced to

Ag Au
27 27

Substraction of translational and rotational contributions results in

Ag Au
24 24



Force field analysis

Infrared and Raman activities (harmonic approximation)
Method Ag Au
Infrared - +
Raman + -

Number of force field parameters
Force field No. 1 No. 2 No. 3
linear 48 48 24
quadratic 2304 1176 600
cubic 110592 19600 9800
quartic 5308416 249900 125100
No. 1 : Total number of force constants .
No. 2 : Total number of force constants k.
No. 3 : Total number of nonvanishing force constants k.

Symmetry properties of force field parameters
Force field Ag Au
linear 24 24
quadratic 600 576
cubic 9800 9800
quartic 125100 124800

Number of independant internal coordinates 24

Literature




Character tables for chemically important point groups Character table for point group Ci Jacobs University Bremen