O Si 
 1.0000000000000000
     5.1561873384341395   -0.0000000000000000    0.4234148477438969
    -0.0000000000000000    5.4207040926629482   -0.0000000000000000
    -5.9493392591997933   -0.0000000000000000    7.6513092981855788
 O   Si 
   8   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -2.9746696295998980 -0.0000000000000000  3.8256546490927894   T   T   T
  2.5780936692170737  2.7103520463314736  0.2117074238719511   T   T   T
 -0.3965759603828249  2.7103520463314736  4.0373620729647408   T   T   T
 -0.0000000000000000  2.7103520463314736 -0.0000000000000000   T   T   T
 -2.9746696295998980  2.7103520463314736  3.8256546490927894   T   T   T
 -1.4873348147999490  3.8033684813211517  1.9128273245463949   T   T   T
 -4.4620044443998443  1.6173356113417985  5.7384819736391846   T   T   T
  0.8674890966417728  2.0023088102901645  4.6628524301556098   T   T   T
 -4.6353106470073175  2.0023088102901654  7.2375263648666568   T   T   T
 -1.6606410174074229  3.4183952823727828  3.4118717157738723   T   T   T
  3.8421587262416690  3.4183952823727828  0.8371977810628199   T   T   T