h2
1.0
  6.7400  0.0000  0.0000 ! lattic vector a(0)
  0.0000  6.0000  0.0000 ! lattic vector a(1)
  0.0000  0.0000  6.0000 ! lattic vector a(2)
2 ! number of atoms in order of POTCAR
cart ! cartesian coordinates
  3.0000  3.0000  3.0000
  3.7400  3.0000  3.0000
