O Si 
 1.0000000000000000
     4.7668478137092753   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.7668478137092762   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.1507783261518529
 O   Si 
   4   2
Selective dynamics
Cartesian
  1.4632922757541915  1.4632922757541926 -0.0000000000000000   T   T   T
  3.3035555379550834  3.3035555379550838 -0.0000000000000000   T   T   T
  0.9201316311004458  3.8467161826088292  1.5753891630759262   T   T   T
  3.8467161826088287  0.9201316311004460  1.5753891630759262   T   T   T
 -0.0000000000000003 -0.0000000000000003  0.0000000000000000   T   T   T
  2.3834239068546386  2.3834239068546377  1.5753891630759262   T   T   T