Si 
 1.0000000000000000
     3.8679999999999999    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.8679999999999999    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.8679999999999999
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.9339999999999999  1.9339999999999999   T   T   T
  1.9339999999999999  0.0000000000000000  1.9339999999999999   T   T   T
  1.9339999999999999  1.9339999999999999  0.0000000000000000   T   T   T