O Si 
 1.0000000000000000
     3.9779126872493888    0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.7493421001088176    0.0000000000000000
     0.0000000000000000    0.0000000000000000    2.4525385011070910
 O   Si 
   8   4
Selective dynamics
Cartesian
  0.5631946972862127  2.5026077819312618 -0.2923325660595359   T   T   T
  1.4257616463384808  4.6214053682319607  0.9339366844940086   T   T   T
  3.4147179899631719  2.5026077819312618  1.5186018166130801   T   T   T
  2.5521510409109074  4.6214053682319607  2.7448710671666277   T   T   T
  3.4147179899631710  2.2467343181775563  2.7448710671666281   T   T   T
  2.5521510409109074  0.1279367318768524  1.5186018166130801   T   T   T
  0.5631946972862127  2.2467343181775563  0.9339366844940086   T   T   T
  1.4257616463384812  0.1279367318768524 -0.2923325660595359   T   T   T
  0.0000000000000000  3.8412800895130208  0.6131346252767732   T   T   T
  1.9889563436246915  3.2827330606502003  1.8394038758303202   T   T   T
 -0.0000000000000000  0.9080620105957962  1.8394038758303202   T   T   T
  1.9889563436246915  1.4666090394586104  0.6131346252767732   T   T   T