C Si 
 1.0000000000000000
     3.2007181727947129   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.2007181727947112    0.0000000000000000
     0.0000000000000000    0.0000000000000000    6.9406297506381263
 C   Si 
   4   2
Selective dynamics
Cartesian
  0.0000000000000000  1.6003590863973554  4.2198467432678965   T   T   T
  1.6003590863973567  0.0000000000000000  0.7495318679488356   T   T   T
  0.0000000000000000  1.6003590863973554  2.7207830073702253   T   T   T
  1.6003590863973567  0.0000000000000000  6.1910978826892897   T   T   T
  0.0000000000000000  0.0000000000000000  1.7351574376595309   T   T   T
  0.0000000000000000  0.0000000000000000  5.2054723129785945   T   T   T