O Si 
 1.0000000000000000
     7.9653800842420903    0.0000000000000000    0.3972745348974831
     0.0000000000000000    4.3726472961513352    0.0000000000000000
    -8.0293440197700559    0.0000000000000000    3.9095134413847239
 O   Si 
   8   4
Selective dynamics
Cartesian
  0.0000000000000000  3.7664427223934078  0.0000000000000000   T   T   T
 -4.0146720098850226  1.5190956810642036  1.9547567206923615   T   T   T
 -5.8757778271483607  1.1446537284266249  3.7208656104949949   T   T   T
  5.8118138916204076  1.1446537284266249  0.5859223657872094   T   T   T
 -1.4000145938114639  1.0573343708613046  2.4942501425407051   T   T   T
  1.3360506582835052  1.0573343708613046  1.8125378337414990   T   T   T
  2.1079211270809712  3.3695471421871561  1.8970064296737641   T   T   T
 -2.1718850626089297  3.3695471421871561  2.4097815466084453   T   T   T
 -1.4576077326733694 -0.0953586487438074  3.6389293380174927   T   T   T
  1.3936437971454130 -0.0953586487438074  0.6678586382647135   T   T   T
  2.3932116460624053  1.9243253862513532  2.6755602517974952   T   T   T
 -2.4571755815903580  1.9243253862513532  1.6312277244847122   T   T   T