C Si 
 1.0000000000000000
     3.0261292072593711   -0.0000000000000000    0.0000000000000000
    -1.5130646036296855    2.6207047686206812   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    4.9416483024356692
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000151306468  1.7471365211494700  2.4732949753899072   T   T   T
  1.5130645884990397  0.8735682649425763  0.0024708241720730   T   T   T
 -0.0000000151306468  1.7471365211494700  4.3264130887615542   T   T   T
  1.5130645884990397  0.8735682649425763  1.8555889375437205   T   T   T