O Si 
 1.0000000000000000
     4.3583688755893570    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.3583688755893570   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    4.3583688755893570
 O   Si 
   8   4
Selective dynamics
Cartesian
  1.0895922188973393  1.0895922188973393  1.0895922188973393   T   T   T
  3.2687766566920176  3.2687766566920176  1.0895922188973393   T   T   T
  3.2687766566920176  1.0895922188973393  3.2687766566920176   T   T   T
  1.0895922188973393  3.2687766566920176  3.2687766566920176   T   T   T
  1.0895922188973393  1.0895922188973393  3.2687766566920176   T   T   T
  3.2687766566920176  3.2687766566920176  3.2687766566920176   T   T   T
  1.0895922188973393  3.2687766566920176  1.0895922188973393   T   T   T
  3.2687766566920176  1.0895922188973393  1.0895922188973393   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.1791844377946785  2.1791844377946785   T   T   T
  2.1791844377946785 -0.0000000000000000  2.1791844377946785   T   T   T
  2.1791844377946785  2.1791844377946785 -0.0000000000000000   T   T   T