I am not sure tetrahedron method works in the noncolinear case. In any event, be careful because its usage for self-consistency will lead to small errors on forces. The main usage of tetrahedra is for calculation of the DOS.
P. --- Paolo Giannozzi, Dept of Physics, University of Udine via delle Scienze 208, 33100 Udine, Italy Phone +39-0432-558216, fax +39-0432-558222
