Ar 
 1.0000000000000000
     3.7101667148095032    0.0000000000000001    0.0000000000000000
    -1.8550833574047516    3.2130986273004845    0.0000000000000000
     0.0000000000000000   -0.0000000000000000    6.0584044375617543
 Ar 
   2
Selective dynamics
Cartesian
 -0.0000000185508337  2.1420657622439858  1.5146011093904388   T   T   T
  1.8550833388539183  1.0710328864771577  4.5438033281713146   T   T   T