O Si 
 1.0000000000000000
     4.2806885767491663   -0.0000000000000000   -0.0000000000000000
    -2.1403442883745831    3.7071850531546304   -0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.2211057827360765
 O   Si 
   6   3
Selective dynamics
Cartesian
 -0.0000000000000004  0.6380162789974148 -0.0000000000000000   T   T   T
  1.5878059827348008  3.3881769136559248  2.1474038551573860   T   T   T
 -1.5878059827348039  3.3881769136559257  1.0737019275786930   T   T   T
  2.1403442883745827  3.0691687741572178 -0.0000000000000000   T   T   T
  0.5525383056397808  0.3190081394987074  2.1474038551573860   T   T   T
  3.7281502711093850  0.3190081394987074  1.0737019275786930   T   T   T
  2.1403442883745840  0.0000000000000002  1.6105528913680383   T   T   T
 -1.0701721441872925  1.8535925265773170  0.5368509637893458   T   T   T
  1.0701721441872913  1.8535925265773170  2.6842548189467341   T   T   T