Si 
 1.0000000000000000
     4.0377109544479186    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    4.0377109544479186    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.0377109544479186
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.0188554772239593  2.0188554772239593   T   T   T
  2.0188554772239593  0.0000000000000000  2.0188554772239593   T   T   T
  2.0188554772239593  2.0188554772239593  0.0000000000000000   T   T   T