C Si 
 1.0000000000000000
     3.1408010387133189   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.1408010387133185   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    7.1354615010487192
 C   Si 
   4   2
Selective dynamics
Cartesian
  0.0000000000000000  1.5704005193566593  4.3584692998790002   T   T   T
  1.5704005193566595 -0.0000000000000000  0.7907385493546401   T   T   T
  0.0000000000000000  1.5704005193566593  2.7769922011697186   T   T   T
  1.5704005193566595 -0.0000000000000000  6.3447229516940791   T   T   T
  0.0000000000000000 -0.0000000000000000  1.7838653752621796   T   T   T
  0.0000000000000000 -0.0000000000000000  5.3515961257865410   T   T   T