O Si 
 1.0000000000000000
     2.9410419995598254   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    2.9410419995598245   -0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.2795513960539004
 O   Si 
   2   1
Selective dynamics
Cartesian
  1.4705209997799114  1.4705209997799114  4.5192280678278101   T   T   T
  1.4705209997799114  1.4705209997799114  0.7603233282260857   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T