O Si 
 1.0000000000000000
     2.9443969262732055   -0.0000000000000000    0.0000000000000000
     0.0000000000000000    2.9443969262732055    0.0000000000000000
     0.0000000000000000    0.0000000000000001    5.4029103366291578
 O   Si 
   2   1
Selective dynamics
Cartesian
  1.4721984631366027  1.4721984631366023  4.5852775465714481   T   T   T
  1.4721984631366027  1.4721984631366023  0.8176327900577077   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T