O Si 
 1.0000000000000000
     4.6882390021417413    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.6882390021417413    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.6882390021417413
 O   Si 
   8   4
Selective dynamics
Cartesian
  1.6015030693896450  1.6015030693896448  1.6015030693896448   T   T   T
  0.7426164316812253  3.0867359327520969  3.9456225704605146   T   T   T
  3.0867359327520969  3.9456225704605146  0.7426164316812253   T   T   T
  3.9456225704605146  0.7426164316812253  3.0867359327520969   T   T   T
  3.0867359327520969  3.0867359327520969  3.0867359327520969   T   T   T
  3.9456225704605146  1.6015030693896448  0.7426164316812253   T   T   T
  1.6015030693896450  0.7426164316812253  3.9456225704605146   T   T   T
  0.7426164316812253  3.9456225704605146  1.6015030693896448   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  2.3441195010708702  0.0000000000000000  2.3441195010708702   T   T   T
  0.0000000000000000  2.3441195010708702  2.3441195010708702   T   T   T
  2.3441195010708702  2.3441195010708702  0.0000000000000000   T   T   T