#LAMMPS  data file  
4 atoms  
1 atom types 

0 1 xlo xhi 
0 1 ylo yhi 
0 3.4 zlo zhi  

Atoms  

1 1 0.78 1 0.5 0.5 0.39
2 1 0.82 1 0.5 0.5 1.19
3 1 0.86 1 0.5 0.5 2.03 
4 1 0.90 1 0.5 0.5 2.87