Si 
 1.0000000000000000
     4.1768610648855349    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.1768610648855349    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.1768610648855349
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.0884305324427683  2.0884305324427683   T   T   T
  2.0884305324427683  0.0000000000000000  2.0884305324427683   T   T   T
  2.0884305324427683  2.0884305324427683  0.0000000000000000   T   T   T