# LAMMPS file containing particle data 

2 atoms 
1 atom types 
0 2.1 xlo xhi 
0 2.1 ylo yhi 
0 2.1 zlo zhi 
0 0 0 xy xz yz 

Atoms # sphere

1 1 1 1 0.5 1.0 1.0
2 1 1 1 1.5 1.0 1.0