4

Si      0.180125826933987      0.072361421827484     -0.031914026716836
Si      1.738545955949781      1.269221800327246     -0.088020867643401
Si      1.705748406294201      0.187453438508874      1.474766946839195
Si     -0.120292227794209      1.777115278894340      1.451990547358804