Si 
 1.0000000000000000
     7.7781745917947056   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    7.7781745917947056   -0.0000000000000001
     0.0000000000000000   -0.0000000000000001    7.7781745917947056
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  3.8890872958973564  3.8890872958973550   T   T   T
  3.8890872958973550 -0.0000000000000000  3.8890872958973550   T   T   T
  3.8890872958973550  3.8890872958973564 -0.0000000000000000   T   T   T