C Si 
 1.0000000000000000
     3.0761033196642451    0.0000000000000000    0.0000000000000000
    -1.5380516598321226    2.6639836194948860    0.0000000000000000
     0.0000000000000000    0.0000000000000000   67.9295374362810378
 C   Si 
  27  27
Selective dynamics
Cartesian
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