O Si 
 1.0000000000000000
     8.1006584525666554   -0.0000000000000000    0.0974535556306437
    -0.0000000000000000    4.2460231880927193   -0.0000000000000000
    -8.3303106444681294   -0.0000000000000000    4.2534568445423568
 O   Si 
   8   4
Selective dynamics
Cartesian
 -0.0000000000000000  3.6926680159902845 -0.0000000000000000   T   T   T
 -4.1651553222340505  1.5203947408250269  2.1267284222711780   T   T   T
 -6.0406795436214162  0.9354454776404924  3.7301003018893089   T   T   T
  5.8110273517199760  0.9354454776404919  0.6208100982836112   T   T   T
 -1.3392721621785539  1.1669230386683402  2.7534893364849014   T   T   T
  1.1096199702771201  1.1669230386683402  1.5974210636880430   T   T   T
  2.2504574377789983  3.2468054272799725  1.5631311766117113   T   T   T
 -2.4801096296803973  3.2468054272799725  2.7877792235612340   T   T   T
 -1.6534628615643432  0.0072964393698335  3.8046986929740387   T   T   T
  1.4238106696629216  0.0072964393698335  0.5462117071988815   T   T   T
  2.3525136883875284  1.7894341041855821  2.4105372746951881   T   T   T
 -2.5821658802889411  1.7894341041855821  1.9403731254777146   T   T   T