4

Si      0.058355344976520     -0.253543630517707      0.200702029626601
Si      1.203429585634251      1.400851661660061      0.281872386631817
Si      1.510011921037781     -0.015466608600082      1.601701203914997
Si      0.000826016281055      1.601229905705626      1.643024017571064