4

Si      0.043761705930754      0.192739903185316     -0.192770678735032
Si      1.261726672972027      1.266539167954684     -0.115635265049338
Si      1.731106884346713      0.012832755109719      1.700713406750863
Si      0.147208074828052      1.589423439016807      1.457064244271890