Martensite orientation

Hello,
I am trying to model different martensite variants, however the crystallographic orientations of these variants are irrational (in decimals) so when I used the orientation command such as;

lattice bcc ${lat_a} &
orient x -0.577 0.816 0 orient y -0.577 -0.408 0.707 orient z 0.577 0.402 0.707

This gives an error as the values must be integers, so is there any way to have a crystal with these irrational values orientation?
Thanks,
Mohamed Hamza

Hello,
I am trying to model different martensite variants, however the
crystallographic orientations of these variants are irrational (in decimals)
so when I used the orientation command such as;

you seem to be confusing basis vectors with miller indices.

axel.