Sn 
 1.0000000000000000
     3.1811974808418997    0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.1811974808419001   -0.0000000000000001
    -0.0000000000000000   -0.0000000000000001    2.8295284704604229
 Sn 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.5905987404209487  1.5905987404209494  1.4147642352302112   T   T   T