Hello all,
Usually I use a bulk calculation and get the lattice constant to create a slab. Now, I would like to create a slab made by two different metal atoms (for exp. a 4x4 using Pt and Ir) and to have different random distributions (one slab Pt20 % Ir 80% than Pt 40% Ir 60% and Pt 50% and Ir 50% and the other way around) but it must be random. So, I relax the slabs, how can I estimate a reasonable lattice constant in this case? I cannot follow the earlier path with the bulk calculation, because I am losing the randomness. Thank you Csaba
