Sn 
 1.0000000000000000
     3.7522853952284017   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.7522853952284012    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.7522853952284017
 Sn 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.8761426976142008  1.8761426976142004  1.8761426976142008   T   T   T