Si2 
1.0
3.8828642703621039e+00 -2.7220997257994296e-16 -6.9332049194854807e-16 
1.9414321351810520e+00 3.3626590975805111e+00 -6.9332049194854807e-16 
1.9414321351810520e+00 1.1208863658601702e+00 3.1703454009570868e+00 
Si 
2 
Cartesian
   1.9740370721    1.1356365170    3.1472691079
   1.9163088745    1.1013354957    0.7494468374
