O Si 
 1.0000000000000000
     4.1488802419484365   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.1488802419484676   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    2.6617032121122723
 O   Si 
   4   2
Selective dynamics
Cartesian
  1.2658663444704421  1.2658663444704734 -0.0000000000000000   T   T   T
  2.8830138974770279  2.8830138974771384 -0.0000000000000000   T   T   T
  0.8085737765034452  3.3403064654446912  1.3308516060560736   T   T   T
  3.3403064654447268  0.8085737765035396  1.3308516060560736   T   T   T
 -0.0000000000000002 -0.0000000000000002  0.0000000000000000   T   T   T
  2.0744401209742365  2.0744401209744385  1.3308516060560736   T   T   T