Si 
 1.0000000000000000
     3.5350907828639220   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.5350907828639220   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.5350907828639224
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.7675453914319614  1.7675453914319619   T   T   T
  1.7675453914319614 -0.0000000000000000  1.7675453914319619   T   T   T
  1.7675453914319614  1.7675453914319614 -0.0000000000000000   T   T   T