Just as a vacancy in real life, a vacancy in a DFT calculation is not an
addition, but a removal... :)

All you need to do is to remove the undesirable atom(s) from the atom
coordinates list in your supercell. Of course, don't forget to update the
number of atoms.

Marcos

On Wed, Apr 21, 2010 at 7:30 PM, Shelton Jr, William Allison <
[email protected]> wrote:

> Can siesta treat vacancies ?  If so, how can it be added to the input file
> ?
>
> Cheers
> Bill
>

Responder a