Si 
 1.0000000000000000
     3.9824063402808529    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    3.9824063402808529   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.9824063402808529
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.9912031701404265  1.9912031701404265   T   T   T
  1.9912031701404265 -0.0000000000000000  1.9912031701404265   T   T   T
  1.9912031701404265  1.9912031701404265 -0.0000000000000000   T   T   T