4

Si     -0.072262981508758      0.047973266591394      0.159447193794138
O       1.609257596566330      1.380084938469760      0.256852970053352
Si      1.215746234295503      0.147278406198304      1.433722550021904
O      -0.011125201444992      1.695538587942119      1.236564754306926