[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?
>
>
>
>
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-- 
Hai-Ping Lan
Department of Electronics ,
Peking University , Bejing, 100871
lanhaiping at gmail.com, hplan at pku.edu.cn
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