Si
 1.0000000000000000
     3.8377785080779616    0.0000000000000000    0.0000000000000000
     1.9231792644480343    3.3391770385740869    0.0000000000000000
     1.8931207673472825    1.1382811681461982    3.1455296255858354
 Si 
   2
Cartesian
  6.6973287290777153  3.9174434822218460  2.7517769163493959
  0.9585443256212165  0.5591894793039537  0.3904480742256582
