C Si 
 1.0000000000000000
     3.0660564577841769    0.0000000000000000    0.0000000000000000
    -1.5330282288920885    2.6552827818784284    0.0000000000000000
     0.0000000000000000    0.0000000000000000   68.6658050628923320
 C   Si 
  27  27
Selective dynamics
Cartesian
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