4

Si      0.153002310766441      0.187530054011536     -0.042253412288152
Si      1.418521575131846      1.457893362516066     -0.111743180504805
Si      1.270416030344274      0.297879125134457      1.678955182286135
Si      0.291408711356922      1.614553590633172      1.532535814990947