Si 
 1.0000000000000000
     4.1990189177776651   -0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.1990189177776651    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.1990189177776651
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.0995094588888330  2.0995094588888330   T   T   T
  2.0995094588888330  0.0000000000000000  2.0995094588888330   T   T   T
  2.0995094588888330  2.0995094588888330  0.0000000000000000   T   T   T