Si 
 1.0000000000000000
     3.8605339616935903    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.8605339616935903    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.8605339616935903
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.9302669808467949  1.9302669808467949   T   T   T
  1.9302669808467949  0.0000000000000000  1.9302669808467949   T   T   T
  1.9302669808467949  1.9302669808467949  0.0000000000000000   T   T   T