Si2 
1.0
3.7610912520698592e+00 2.6118352045893383e-16 -1.5004167260808830e-17 
1.8805456260349296e+00 3.2572005702439197e+00 -6.8113798203590271e-16 
1.8805456260349296e+00 1.0857335234146404e+00 3.0709181478722201e+00 
Si 
2 
Cartesian
   5.5871830183    1.0832827563    3.0417814402
   1.9509995332    1.0572773402    0.7807161280
