4

Si     -0.023355873324547      0.241229004970342      0.022012931688855
Si      1.316343479303719      1.425342409524768     -0.014337243893452
Si      1.314431065450862      0.043761705930754      1.220515293547215
Si      0.192739903185316      1.307229321264967      1.261726672972027