Si 
 1.0000000000000000
     4.0777608621049506    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.0777608621049506    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.0777608621049506
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.0388804310524762  2.0388804310524762   T   T   T
  2.0388804310524762  0.0000000000000000  2.0388804310524762   T   T   T
  2.0388804310524762  2.0388804310524762  0.0000000000000000   T   T   T