O Si 
 1.0000000000000000
     2.3378005849828294    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    2.3378005849825221    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    5.1101508076378606
 O   Si 
   2   1
Selective dynamics
Cartesian
  1.1689002924914089  1.1689002924912388  4.1753294579981981   T   T   T
  1.1689002924914089  1.1689002924912388  0.9348213496396232   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T