[Wien] Euler angles.

[Peter Blaha]

> I have studied the mail list archive but still  it is not very clear for me
> how to use the Euler angles for a hexagonal case when you want to do EELS
> orientation dependant calculations? As far I know the Euler transformation
> is between two carthesian systems.  How that work when you have a hexagonal
> case?
> For instance if you want to hit the specimen in the ab plane you can use
> (0,90,0) but the question is along of which direction will be the beam?
> Along of x [11-20] or along of [01-10] which is perpendicular on  y?

In our definition the hexagonal b axis coincides with carthesian y.
(the hex a and carthesian x axes have an angle of 30 degree.)

                                      P.Blaha
--------------------------------------------------------------------------
Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
Phone: +43-1-58801-15671             FAX: +43-1-58801-15698
Email: blaha at theochem.tuwien.ac.at    WWW: http://info.tuwien.ac.at/theochem/
--------------------------------------------------------------------------