Si 
 1.0000000000000000
     3.9082260052962421   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.9082260052962421    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.9082260052962421
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.9541130026481210  1.9541130026481210   T   T   T
  1.9541130026481210  0.0000000000000000  1.9541130026481210   T   T   T
  1.9541130026481210  1.9541130026481210  0.0000000000000000   T   T   T