Si 
 1.0000000000000000
     3.0530886119706495    0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.0530886119706486    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.0530886119706495
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.5265443059853245  1.5265443059853250   T   T   T
  1.5265443059853250  0.0000000000000000  1.5265443059853250   T   T   T
  1.5265443059853250  1.5265443059853245  0.0000000000000000   T   T   T