C Si 
 1.0000000000000000
     3.0846778118192195    0.0000000000000000   -0.0000000000000000
    -1.5423389059096098    2.6714093475256400   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    5.0372577733854094
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154233895  1.7809395739217913  2.5211475156081025   T   T   T
  1.5423388904862207  0.8904697914132444  0.0025186289153980   T   T   T
 -0.0000000154233895  1.7809395739217913  4.4101191805702129   T   T   T
  1.5423388904862207  0.8904697914132444  1.8914902938775091   T   T   T