Si 
 1.0000000000000000
     4.1496194919855505   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.1496194919855505    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.1496194919855505
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.0748097459927757  2.0748097459927757   T   T   T
  2.0748097459927757  0.0000000000000000  2.0748097459927757   T   T   T
  2.0748097459927757  2.0748097459927757  0.0000000000000000   T   T   T