O Si 
 1.0000000000000000
     4.1845886299702517    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.1845886299702517   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    2.6804729840453709
 O   Si 
   4   2
Selective dynamics
Cartesian
  1.2769688076993850  1.2769688076993848 -0.0000000000000000   T   T   T
  2.9076198222708713  2.9076198222708713 -0.0000000000000000   T   T   T
  0.8153255072857424  3.3692631226845102  1.3402364920226857   T   T   T
  3.3692631226845098  0.8153255072857422  1.3402364920226857   T   T   T
 -0.0000000000000002 -0.0000000000000002  0.0000000000000000   T   T   T
  2.0922943149851263  2.0922943149851263  1.3402364920226857   T   T   T