Si 
 1.0000000000000000
     6.6924797108579259    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    6.6924797108579259   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    6.6924797108579259
 Si 
  12
Selective dynamics
Cartesian
  1.6731199277144815 -0.0000000000000000  3.3462398554289630   T   T   T
  5.0193597831434431 -0.0000000000000000  3.3462398554289630   T   T   T
  3.3462398554289630  1.6731199277144815 -0.0000000000000000   T   T   T
  3.3462398554289630  5.0193597831434431 -0.0000000000000000   T   T   T
 -0.0000000000000000  3.3462398554289630  1.6731199277144817   T   T   T
 -0.0000000000000000  3.3462398554289630  5.0193597831434431   T   T   T
 -0.0000000000000000  1.6731199277144815  3.3462398554289630   T   T   T
 -0.0000000000000000  5.0193597831434431  3.3462398554289630   T   T   T
  1.6731199277144815  3.3462398554289630 -0.0000000000000000   T   T   T
  5.0193597831434431  3.3462398554289630 -0.0000000000000000   T   T   T
  3.3462398554289630 -0.0000000000000000  5.0193597831434431   T   T   T
  3.3462398554289630 -0.0000000000000000  1.6731199277144817   T   T   T