O Si 
 1.0000000000000000
     4.3503223940598925   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    4.3503223940598934    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    2.1161588957865618
 O   Si 
   4   2
Selective dynamics
Cartesian
  1.2065264739797823  1.2065264739797819  0.0000000000000000   T   T   T
  3.1437959200801120  3.1437959200801124  0.0000000000000000   T   T   T
  0.9686347230501646  3.3816876710097263  1.0580794478932809   T   T   T
  3.3816876710097277  0.9686347230501645  1.0580794478932809   T   T   T
 -0.0000000000000002 -0.0000000000000002 -0.0000000000000000   T   T   T
  2.1751611970299458  2.1751611970299463  1.0580794478932809   T   T   T