LAMMPS data file 2 atoms 1 bonds 0 angles 0 dihedrals 1 atom types 1 bond types 0 angle types 0 dihedral types -18.000000 18.0 xlo xhi -3.00 3.00000 ylo yhi -3.00 3.00000 zlo zhi Masses 1 14.020000 Atoms 1 1 1 0.000000 0.000 0.000000 2 1 1 2.0 0.000 0.000000 Bonds 1 1 1 2 Velocities 1 0.000000 0.000000 0.000000 2 0.000000 0.000000 0.000000