Si 
 1.0000000000000000
     6.6202464262540239    0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.6202464262540248   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.8857514317354780
 Si 
   8
Selective dynamics
Cartesian
  5.4226868990411354  5.4226868990411328 -0.0000000000000000   T   T   T
  1.1975595272128885  1.1975595272128883 -0.0000000000000000   T   T   T
  1.1975595272128885  5.4226868990411319 -0.0000000000000000   T   T   T
  5.4226868990411354  1.1975595272128883 -0.0000000000000000   T   T   T
  2.1125636859141235  2.1125636859141239  1.9428757158677394   T   T   T
  4.5076827403399040  4.5076827403399022  1.9428757158677394   T   T   T
  4.5076827403399040  2.1125636859141230  1.9428757158677394   T   T   T
  2.1125636859141235  4.5076827403399022  1.9428757158677394   T   T   T