C Si 
 1.0000000000000000
     3.0825103790139607   -0.0000000000000000   -0.0000000000000000
    -1.5412551895069804    2.6695322956552885   -0.0000000000000000
    -0.0000000000000000    0.0000000000000000    5.0337183703220783
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154125523  1.7796882060019668  2.5193760443578350   T   T   T
  1.5412551740944287  0.8898441074502039  0.0025168591967948   T   T   T
 -0.0000000154125523  1.7796882060019668  4.4070204332053367   T   T   T
  1.5412551740944287  0.8898441074502039  1.8901612480442962   T   T   T