C Si 
 1.0000000000000000
     4.2390207657414578    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.2390207657414578   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    4.2390207657414578
 C   Si 
   4   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.1195103828707289  2.1195103828707289   T   T   T
  2.1195103828707289 -0.0000000000000000  2.1195103828707289   T   T   T
  2.1195103828707289  2.1195103828707289 -0.0000000000000000   T   T   T
  2.1195103828707289  2.1195103828707289  2.1195103828707289   T   T   T
  2.1195103828707289  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.1195103828707289 -0.0000000000000000   T   T   T
 -0.0000000000000000 -0.0000000000000000  2.1195103828707289   T   T   T