Si 
 1.0000000000000000
     4.9995270562415559   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    4.9995270562415559    0.0000000000000000
     0.0000000000000000    0.0000000000000000    2.7103692711321754
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000 -0.0000000000000000   T   T   T
  2.4997635281207780  2.4997635281207780  1.3551846355660877   T   T   T
 -0.0000000000000000  2.4997635281207780  0.6775923177830439   T   T   T
  2.4997635281207780  0.0000000000000000  2.0327769533491313   T   T   T