4

O      -0.193244867867757      0.118939421408867      0.039268192583267
Si      1.730100440285447      1.400207885479981      0.125289820474758
Si      1.576219114894583      0.178289475233445      1.711828907638477
O      -0.159610445082244      1.232419848510659      1.572553771965862