4

Si      0.180125826933987      0.072361421827484     -0.031914026716836
Si      1.693155380543257      1.269221800327246     -0.144423678867069
Si      1.720207587335664      0.187453438508874      1.394416113115363
Si      0.036911837114952      1.777115278894340      1.144359640875933