atom_style atomic

units           lj
atom_style      atomic
atom_modify   sort 0 0.2

lattice         fcc 0.8442
region          box block 0 10 0 10 0 10
create_box      1 box
mass 1 1.0
fix  1 all nve

minimize 0.001 0.0001 1000.0 10000.0

run 10

run_style respa 1

run 10