I’m a beginner to use LAMMPS. I wonder if anyone could help me to give any advice on my establishment of a Al-Cu alloy structure. What i did is to set up a 0 10 0 10 0 10 fcc box, and then try to use create_atoms in this box for 96%Al-4%Cu. The distribution of these two kinds of atoms are unknown in this box, so can anybody here know the best way to set it up? Any help is greatly appreciated!