Si 
 1.0000000000000000
     7.7781745917947038    0.0000000000000000    0.0000000000000000
     0.0000000000000000    7.7781745917947065    0.0000000000000001
    -0.0000000000000000    0.0000000000000001    7.7781745917947074
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  3.8890872958973564  3.8890872958973559   T   T   T
  3.8890872958973546  0.0000000000000000  3.8890872958973559   T   T   T
  3.8890872958973546  3.8890872958973564  0.0000000000000000   T   T   T