Na1 Cl1
1.0
   0.00000000    2.83455468    2.83455468
   2.83455468    0.00000000    2.83455468
   2.83455468    2.83455468    0.00000000
Na Cl
1 1
direct
   0.50000000    0.50000000    0.50000000 Na
   0.00000000    0.00000000    0.00000000 Cl
