C Si 
 1.0000000000000000
     3.0554506061632885    0.0000000000000000   -0.0000000000000000
    -1.5277253030816442    2.6460978449459684   -0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.9895299461872780
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000152772535  1.7640652387843050  2.4972597380628776   T   T   T
  1.5277252878043910  0.8820326238023157  0.0024947649692376   T   T   T
 -0.0000000152772535  1.7640652387843050  4.3683334678908174   T   T   T
  1.5277252878043910  0.8820326238023157  1.8735684947971778   T   T   T