O Si 
 1.0000000000000000
     7.9696655029653911    0.0000000000000000    0.0646774647542446
     0.0000000000000000    4.1767441136986818   -0.0000000000000000
    -8.2127044234724274   -0.0000000000000000    4.2526568409591290
 O   Si 
   8   4
Selective dynamics
Cartesian
  0.0000000000000000  3.6298758266515567 -0.0000000000000000   T   T   T
 -4.1063522117362261  1.4616859833247042  2.1263284204795641   T   T   T
 -5.9608687059484406  0.9323959995711510  3.7686922444766999   T   T   T
  5.7178297854412898  0.9323959995711510  0.5486420612365446   T   T   T
 -1.3257370601501639  1.1543659920609302  2.7132886280575823   T   T   T
  1.0826981396430748  1.1543659920609302  1.6040456776556979   T   T   T
  2.2048975286161361  3.2077478610366090  1.6058366271737288   T   T   T
 -2.4479364491232456  3.2077478610366090  2.7114976785395548   T   T   T
 -1.6331698842860511  0.0086650137017310  3.7408679778800575   T   T   T
  1.3901309637789696  0.0086650137017310  0.5764663278332415   T   T   T
  2.3100548821933824  1.7443571453322850  2.4158803994104918   T   T   T
 -2.5530938027004861  1.7443571453322850  1.9014539063028106   T   T   T