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[<piiitrzs@seznam.cz>]

Dear Abinit users,
I analyzed phonon spectra of Al FCC crystal structure using Anaddb. To do this
at the first time I used parameter brav 2 (according to the help file: 
specific
for Face Centered lattices). At the second I used parameter brav 1 (all the
lattices, including FCC, BCC and hexagonal). I compared phonon spectra 
obtained
by using brav 1 and brav 2 and there is a difference between them!
Can anybody explain me how Abinit performs the analysis?
Also I would like to perform an analysis of Al crystal which is under <100>
unaxial tension. But I don't really know what value of parameter brav I have 
to
use. Does anybody have an idea?

Best regards

Peter Rehak
Institute of Physical Engineering
Faculty of Mechanical Engineering
Brno University of Technology
Technicka 2, Brno 616 69, Czech Republic