O Si 
 1.0000000000000000
     2.2483913673077733   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    2.2483913673077733    0.0000000000000000
    -0.0000000000000000    0.0000000000000001    2.5323959598195156
 O   Si 
   2   1
Selective dynamics
Cartesian
  1.1241956836538869  1.1241956836538871  1.8904103054310435   T   T   T
  1.1241956836538869  1.1241956836538871  0.6419856543884699   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T