Si 
 1.0000000000000000
     3.9545105827876026   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.9545105827876026    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.9545105827876026
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.9772552913938022  1.9772552913938022   T   T   T
  1.9772552913938022  0.0000000000000000  1.9772552913938022   T   T   T
  1.9772552913938022  1.9772552913938022  0.0000000000000000   T   T   T