C Si 
 1.0000000000000000
     4.2309830583165979   -0.0000000000000000   -0.0000000000000000
     0.0000000000000000    4.2309830583165979    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.2309830583165979
 C   Si 
   4   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.1154915291582990  2.1154915291582990   T   T   T
  2.1154915291582990  0.0000000000000000  2.1154915291582990   T   T   T
  2.1154915291582990  2.1154915291582990  0.0000000000000000   T   T   T
  2.1154915291582990  2.1154915291582990  2.1154915291582990   T   T   T
  2.1154915291582990 -0.0000000000000000 -0.0000000000000000   T   T   T
  0.0000000000000000  2.1154915291582990  0.0000000000000000   T   T   T
  0.0000000000000000  0.0000000000000000  2.1154915291582990   T   T   T