[Pw_forum] nanotubes symmetry

[lan haiping]

Hi,
how do you come to this conclusion ?  The symmetry operation of nanotubes
should depend on their chiral indexs..

On Sat, Jul 5, 2008 at 7:21 PM, zahra sadat naghavi <szs_naghavi at yahoo.com>
wrote:

> Dear all !
>
> Armchairs  and Zigzags  nanotubes have  24 symmetry oprerations.*of course
> it is important that in which latticce they are located *but in Hexagonal
> we expected 24 symmetrys for (6,6) but pw.x does not distinguish horizental
> mirror planes and talk about only 12.
>
> can anybody help?
>
>
>
>
> _______________________________________________
> Pw_forum mailing list
> Pw_forum at pwscf.org
> http://www.democritos.it/mailman/listinfo/pw_forum
>
>


-- 
Hai-Ping Lan
Department of Electronics ,
Peking University , Bejing, 100871
lanhaiping at gmail.com, hplan at pku.edu.cn
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.democritos.it/pipermail/pw_forum/attachments/20080705/6cd2fccc/attachment.htm