C Si 
 1.0000000000000000
     3.0261355269493122   -0.0000000000000000    0.0000000000000000
    -1.5130677634746561    2.6207102416327119   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    4.9416586224458845
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000151306779  1.7471401698241755  2.4733001405549588   T   T   T
  1.5130677483439781  0.8735700892799383  0.0024708293320150   T   T   T
 -0.0000000151306779  1.7471401698241755  4.3264221239305796   T   T   T
  1.5130677483439781  0.8735700892799383  1.8555928127076362   T   T   T