Na 
 1.0000000000000000
     5.5768903535727548   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    5.5768903535727548   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    5.5768903535727548
 Na 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  2.7884451767863778  2.7884451767863778  2.7884451767863778   T   T   T