4

Si      0.202887227140891      0.145533310583346     -0.204145969153263
Si      1.448094542635629      1.720944912364830      0.365344044221808
Si      1.681903272944352     -0.178165024345845      1.712192530768357
Si      0.129906654314070      1.282204502380368      1.782781973647627