7

Na 0.00000000 0.00000000 0.00000000
Na 2.84500000 2.84500000 0.00000000
Na 2.84500000 0.00000000 2.84500000
Na 0.00000000 2.84500000 2.84500000
Cl 0.00000000 0.00000000 2.84500000
Cl 0.00000000 2.84500000 0.00000000
Cl 2.84500000 0.00000000 0.00000000
