Si2 
1.0
3.7948212326535233e+00 -5.0216195815308118e-16 -6.7880536432920507e-16 
1.8974106163267617e+00 3.2864115902985280e+00 -2.3471615447914246e-16 
1.8974106163267617e+00 1.0954705300995089e+00 3.0984585616935405e+00 
Si 
2 
Cartesian
   1.9554543059    1.1347628657    3.0585072775
   1.9371331692    1.1060262685    0.7948265686
