O Si 
 1.0000000000000000
     7.7470101248262084   -0.0000000000000000   -0.1251793260436818
    -0.0000000000000000    4.3153724468035088   -0.0000000000000000
    -8.0841891557064507   -0.0000000000000000    4.4964129522513332
 O   Si 
   8   4
Selective dynamics
Cartesian
 -0.0000000000000000  3.7311153745041654 -0.0000000000000000   T   T   T
 -4.0420945778532218  1.4116888335507289  2.2482064761256662   T   T   T
 -5.8345147851882118  0.9624276033792667  3.9940704070054558   T   T   T
  5.4973357543079713  0.9624276033792667  0.3771632192021946   T   T   T
 -1.3351128684200764  1.1892018663958976  2.7934314047185609   T   T   T
  0.9979338375398379  1.1892018663958976  1.5778022214890908   T   T   T
  2.1487860604616880  3.3254811643911655  1.6174825695109250   T   T   T
 -2.4859650913419271  3.3254811643911655  2.7537510566967276   T   T   T
 -1.7058943692995521  0.0310781114594697  3.7982923416069059   T   T   T
  1.3687153384193134  0.0310781114594697  0.5729412846007458   T   T   T
  2.1787157042811023  1.8321291665397990  2.4203492077650806   T   T   T
 -2.5158947351613437  1.8321291665397990  1.9508844184425713   T   T   T