4

Si      0.210053546513952      0.265439350193324     -0.050313099518803
Si      1.795946725469784      1.657104594115611     -0.009571461040452
Si      1.356871985592266      0.241229004970342      1.522012931688855
Si      0.043761705930754      1.220515293547215      1.692739903185316