O Si 
 1.0000000000000000
     6.9801256124879609    0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.9801256124879609    0.0000000000000000
     0.0000000000000000    0.0000000000000000    6.9801256124879609
 O   Si 
  16   8
Selective dynamics
Cartesian
  1.0548228956170069  1.0548228956170074  1.0548228956170069   T   T   T
  2.4352399106269731  5.9253027168709504  4.5448857018609861   T   T   T
  5.9253027168709504  4.5448857018609861  2.4352399106269731   T   T   T
  4.5448857018609861  2.4352399106269731  5.9253027168709504   T   T   T
  4.4599547094068210  4.6109187617824094  0.3121710597919943   T   T   T
  6.0102337093251190  2.3692068507055475  3.8022338660359738   T   T   T
  2.5201709030811350  1.1208559555384303  3.1778917464519840   T   T   T
  0.9698919031628437  5.8592696569495253  6.6679545526959645   T   T   T
  0.3121710597919943  4.4599547094068210  4.6109187617824094   T   T   T
  3.8022338660359738  6.0102337093251190  2.3692068507055484   T   T   T
  3.1778917464519840  2.5201709030811350  1.1208559555384299   T   T   T
  6.6679545526959645  0.9698919031628437  5.8592696569495253   T   T   T
  4.6109187617824094  0.3121710597919943  4.4599547094068210   T   T   T
  2.3692068507055475  3.8022338660359738  6.0102337093251190   T   T   T
  1.1208559555384301  3.1778917464519840  2.5201709030811350   T   T   T
  5.8592696569495253  6.6679545526959645  0.9698919031628437   T   T   T
  1.9633166780071951  1.9633166780071951  1.9633166780071951   T   T   T
  1.5267461282367847  5.0168089344807569  5.4533794842511734   T   T   T
  5.0168089344807569  5.4533794842511734  1.5267461282367847   T   T   T
  5.4533794842511734  1.5267461282367847  5.0168089344807569   T   T   T
  0.1453626376073700  0.1453626376073700  0.1453626376073700   T   T   T
  3.3447001686366096  6.8347629748805847  3.6354254438513478   T   T   T
  6.8347629748805847  3.6354254438513478  3.3447001686366096   T   T   T
  3.6354254438513478  3.3447001686366096  6.8347629748805847   T   T   T