Si 
 1.0000000000000000
     3.9393438057867338    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.9393438057867338   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.9393438057867338
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.9696719028933671  1.9696719028933671   T   T   T
  1.9696719028933671 -0.0000000000000000  1.9696719028933671   T   T   T
  1.9696719028933671  1.9696719028933671 -0.0000000000000000   T   T   T