Si 
 1.0000000000000000
     6.7567516688777571    0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.7567516688777571   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    6.7567516688777571
 Si 
  12
Selective dynamics
Cartesian
  1.6891879172194393 -0.0000000000000000  3.3783758344388786   T   T   T
  5.0675637516583185 -0.0000000000000000  3.3783758344388786   T   T   T
  3.3783758344388786  1.6891879172194393 -0.0000000000000000   T   T   T
  3.3783758344388786  5.0675637516583185 -0.0000000000000000   T   T   T
  0.0000000000000000  3.3783758344388786  1.6891879172194395   T   T   T
  0.0000000000000000  3.3783758344388786  5.0675637516583185   T   T   T
  0.0000000000000000  1.6891879172194393  3.3783758344388786   T   T   T
  0.0000000000000000  5.0675637516583185  3.3783758344388786   T   T   T
  1.6891879172194393  3.3783758344388786 -0.0000000000000000   T   T   T
  5.0675637516583185  3.3783758344388786 -0.0000000000000000   T   T   T
  3.3783758344388786 -0.0000000000000000  5.0675637516583185   T   T   T
  3.3783758344388786 -0.0000000000000000  1.6891879172194395   T   T   T