  9
  Displayed atoms	      0.0000000
  Na       0.0       0.0       0.0       1
  Na       5.62       0.0       0.0       1
  Na       0.0       0.0       5.62       1
  Na       5.62       0.0       5.62       1
  Na       2.81       0.0       2.81       1
  Cl       2.81       0.0       0.0       -1
  Cl       0.0       0.0       2.81       -1
  Cl       5.62       0.0       2.81       -1
  Cl       2.81       0.0       5.62       -1
