O Si 
 1.0000000000000000
     1.1672303419669467    0.0000000000000000    0.0000000000000000
     0.0000000000000000    1.1672303419669467   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000001    3.5439041185653286
 O   Si 
   2   1
Selective dynamics
Cartesian
  0.5836151709834470  0.5836151709834249  3.5363733155614345   T   T   T
  0.5836151709834470  0.5836151709834249  0.0075308030036246   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T