[Pw_forum] about "free" structure

Eyvaz Isaev eyvaz_isaev at yahoo.com
Tue May 30 13:25:14 CEST 2006


Hi, 

The way to overcome the troubles with ibrav=0 
for phonon calculations is first to get cartesian
coordinates   using a specified basis vectors and then
turn to your "native" lattice and use "alat" units.

Bests,
Eyvaz.

--- Paolo Giannozzi <giannozz at nest.sns.it> wrote:

> On Tuesday 30 May 2006 11:35, sun jason wrote:
> 
> > The dynmat.x will not work if I run the scf and
> phonon calculation
> > with a "free" structure by ibrav=0 and specified
> lattice parameters.
> 
> it is a known problem, but fixing it requires some
> care in order
> to avoid breaking something else
> 
> Paolo
> -- 
> Paolo Giannozzi             e-mail: 
> giannozz at nest.sns.it
> Scuola Normale Superiore    Phone:   +39/050-509876,
> Fax:-563513 
> Piazza dei Cavalieri 7      I-56126 Pisa, Italy
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