C Si 
 1.0000000000000000
     3.0825103848374553    0.0000000000000000   -0.0000000000000000
    -1.5412551924187277    2.6695323006985832   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    5.0337183798318126
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154125525  1.7796882093641631  2.5193760491174544   T   T   T
  1.5412551770061760  0.8898441091313020  0.0025168592015470   T   T   T
 -0.0000000154125525  1.7796882093641631  4.4070204415311158   T   T   T
  1.5412551770061760  0.8898441091313020  1.8901612516152078   T   T   T