O Si 
 1.0000000000000000
     6.6663118958055172    1.5957421750918253   -0.7264117563808328
    -0.3281453211398597    5.2208878846553901   -0.4914902352692280
    -1.7152079118312904   -1.4631019480852065    6.6677768440881371
 O   Si 
   8   4
Selective dynamics
Cartesian
  6.2595612085551497  6.3454239630388516  1.0722815888799697   T   T   T
  0.9878260368297267  2.6824640711263146  1.9092135269290491   T   T   T
  0.8142837805239617  4.2411100951834646  4.1558895257804593   T   T   T
  7.0016169173375404  2.5113530078233723 -0.6516432263383524   T   T   T
  2.7779038742651037  4.8244007978588117  5.8067060334599709   T   T   T
  2.5326536125329122  2.3140207084342497 -0.1906846046061973   T   T   T
  0.1901728769480137  3.5216078813362959 -0.3123447638007076   T   T   T
  2.3911368470520573  1.2540937265841783  4.4327322862763134   T   T   T
  6.0339776970556871  6.4120329961527185 -0.5341691770453210   T   T   T
  0.3381503536583032  3.7935547227099322  2.7679489102054307   T   T   T
  1.0420586778722736  2.3142543859805000  0.3390023877309244   T   T   T
  1.8753094873123799  0.1955228798939181  5.4657788374502747   T   T   T