[Pw_forum] Problem with Raman and Infrared Active Modes

[Paolo Giannozzi]

On Fri, 2011-10-07 at 15:54 +0300, HASAN SAHIN wrote:

> According to this, my system has a symmetry. 

it has no inversion symmetry. If I remember correctly, in systems
having inversion symmetry, modes are either IR- or Raman-active
but not both. Do you have any evidence that some of the modes 
indicated as active are not?

P.
-- 
Paolo Giannozzi, IOM-Democritos and University of Udine, Italy