Si2 
1.0
3.8706518970264820e+00 -5.4849730076737049e-16 -6.3736812045789992e-16 
1.9353259485132410e+00 3.3520828720313616e+00 -6.3736812045789992e-16 
1.9353259485132410e+00 1.1173609573437868e+00 3.1603740398835387e+00 
Si 
2 
Cartesian
   5.7786604636    3.2990054454    0.0214139215
   1.9444446533    1.1243647817    0.7623275219
