Si 
 1.0000000000000000
    -2.6996850214864794    0.0000000000000000    2.6996850214864794
     0.0000000000000000    2.6996850214864794    2.6996850214864794
    -2.6996850214864794    2.6996850214864794    0.0000000000000000
   2
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000
  -1.3498425100000000  1.3498425100000000  1.3498425100000000
