C Si 
 1.0000000000000000
     3.0826991813867397    0.0000000000000000    0.0000000000000000
    -1.5413495906933699    2.6696958033064098   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    5.0340266833835203
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154134965  1.7797972111032594  2.5195303550424710   T   T   T
  1.5413495752798740  0.8898986100011228  0.0025170133507109   T   T   T
 -0.0000000154134965  1.7797972111032594  4.4072903612931915   T   T   T
  1.5413495752798740  0.8898986100011228  1.8902770196014336   T   T   T