Sn 
 1.0000000000000000
     3.0599102205464908    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.0599102205464908   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.0599102205464908
 Sn 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.5299551102732456  1.5299551102732458  1.5299551102732456   T   T   T