[Pw_forum] my understanding about ASR

[Stefano Baroni]

yes SB

On Jun 19, 2008, at 9:39 PM, Eduardo Ariel Menendez Proupin wrote:

> The forces are zero also if the system is rotated. So, why dont' we  
> get 5 zero frecuencies in the crystal, as in a dimer or 6 as in a  
> complex molecule? Is this is forced by the periodic boundary  
> conditions?
>
> -- 
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---
Stefano Baroni - SISSA  &  DEMOCRITOS National Simulation Center -  
Trieste
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