Reduction formula for point group Ci

Your representation

E i
60 0

can be reduced to

Ag Au
30 30

Substraction of translational and rotational contributions results in

Ag Au
27 27



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 54 54 27
quadratic 2916 1485 756
cubic 157464 27720 13860
quartic 8503056 395010 197694
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 27 27
quadratic 756 729
cubic 13860 13860
quartic 197694 197316

Number of independant internal coordinates 27

Literature




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