Si 
 1.0000000000000000
     6.6574338487886839   -0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.6574338487886839   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    6.6574338487886839
 Si 
  12
Selective dynamics
Cartesian
  1.6643584621971712 -0.0000000000000000  3.3287169243943424   T   T   T
  4.9930753865915127 -0.0000000000000000  3.3287169243943424   T   T   T
  3.3287169243943424  1.6643584621971712 -0.0000000000000000   T   T   T
  3.3287169243943424  4.9930753865915127 -0.0000000000000000   T   T   T
  0.0000000000000000  3.3287169243943424  1.6643584621971714   T   T   T
  0.0000000000000000  3.3287169243943424  4.9930753865915127   T   T   T
  0.0000000000000000  1.6643584621971712  3.3287169243943424   T   T   T
  0.0000000000000000  4.9930753865915127  3.3287169243943424   T   T   T
  1.6643584621971712  3.3287169243943424 -0.0000000000000000   T   T   T
  4.9930753865915127  3.3287169243943424 -0.0000000000000000   T   T   T
  3.3287169243943424 -0.0000000000000000  4.9930753865915127   T   T   T
  3.3287169243943424 -0.0000000000000000  1.6643584621971714   T   T   T