Si 
 1.0000000000000000
     3.7762616477718280    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.7762616477718280    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.7762616477718280
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.8881308238859147  1.8881308238859147   T   T   T
  1.8881308238859147  0.0000000000000000  1.8881308238859147   T   T   T
  1.8881308238859147  1.8881308238859147  0.0000000000000000   T   T   T