Si 
 1.0000000000000000
     4.3265037544455041   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.3265037544455041    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.3265037544455041
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.1632518772227520  2.1632518772227520   T   T   T
  2.1632518772227520  0.0000000000000000  2.1632518772227520   T   T   T
  2.1632518772227520  2.1632518772227520  0.0000000000000000   T   T   T