O Si 
 1.0000000000000000
     2.7436186241315870   -0.0000000000000000   -0.0000000000000000
     0.0000000000000000    2.7436186241315870    0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.7117172618206258
 O   Si 
   2   1
Selective dynamics
Cartesian
  1.3718093120657942  1.3718093120657935  4.5499749708879786   T   T   T
  1.3718093120657942  1.3718093120657935  1.1617422909326498   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T