O Si 
 1.0000000000000000
     5.1291415618539711    0.0000000000000000    0.0000000000000000
    -2.5645707809269855    4.4419668921721316    0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.6421953212291198
 O   Si 
   6   3
Selective dynamics
Cartesian
 -0.0000000000000004  1.8283004419959428 -0.0000000000000000   T   T   T
  0.9812161524081806  3.5278166711741590  3.7614635474860814   T   T   T
 -0.9812161524081819  3.5278166711741590  1.8807317737430407   T   T   T
  2.5645707809269842  2.6136664501761895  0.0000000000000000   T   T   T
  1.5833546285188025  0.9141502209979715  3.7614635474860814   T   T   T
  3.5457869333351657  0.9141502209979715  1.8807317737430407   T   T   T
  2.5645707809269846  0.0000000000000002  2.8210976606145604   T   T   T
 -1.2822853904634925  2.2209834460860662  0.9403658868715196   T   T   T
  1.2822853904634921  2.2209834460860662  4.7018294343576006   T   T   T