O Si 
 1.0000000000000000
     7.8499715362338414   -0.0000000000000000    0.2831756858310296
    -0.0000000000000000    4.2433268710861292   -0.0000000000000000
    -7.7481006990808501    0.0000000000000000    4.1547058533413121
 O   Si 
   8   4
Selective dynamics
Cartesian
  4.0389720188777343  1.4709324585856614  1.2308515458770275   T   T   T
  0.1649216693373062  2.7723944125004660  3.3082044725476902   T   T   T
 -4.4518072702024778  1.2842952314759848  3.0676761059598947   T   T   T
 -0.5777569206620548  2.9590316396101475  0.9903231792892316   T   T   T
 -0.6799317879746846  0.8120651982634897  3.3290972077271039   T   T   T
  3.1941185615657481  3.4312616728226404  1.2517442810564410   T   T   T
  1.3908227439698093  0.9868186326015405  0.6567661604655539   T   T   T
 -2.4832276055706219  3.2565082384845909  2.7341190871362140   T   T   T
  0.1410137989565965  1.6847833401635184  4.5179629699814532   T   T   T
  4.0150641484970322  2.5585435309226119  2.4406100433107896   T   T   T
  2.9634577184730544  0.5991061417424617  0.3916302152935046   T   T   T
 -0.9105926310673761  3.6442207293436688  2.4689831419641686   T   T   T