O Si 
 1.0000000000000000
     7.7648042063831735   -0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.3518358553516627    0.0000000000000000
     0.0000000000000000    0.0000000000000000    8.6699651947608682
 O   Si 
  16   8
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  3.8824021031915859 -0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  0.0000000000000000  4.3349825973804341   T   T   T
  3.8824021031915859 -0.0000000000000000  4.3349825973804341   T   T   T
  0.0000000000000000  2.7438283942348480  2.1674912986902171   T   T   T
  3.8824021031915859  1.6080074611168129  2.1674912986902171   T   T   T
 -0.0000000000000000  1.6080074611168129  6.5024738960706525   T   T   T
  3.8824021031915859  2.7438283942348480  6.5024738960706525   T   T   T
  1.9412010515957929 -0.0000000000000000  6.9766385073789436   T   T   T
  5.8236031547873806  0.0000000000000000  6.0283092847623596   T   T   T
  5.8236031547873806 -0.0000000000000000  1.6933266873819204   T   T   T
  1.9412010515957929  0.0000000000000000  2.6416559099985095   T   T   T
  1.9412010515957929  2.1759179276758314  8.2694692220605219   T   T   T
  5.8236031547873806  2.1759179276758314  4.7354785700807849   T   T   T
  5.8236031547873806  2.1759179276758314  0.4004959727003471   T   T   T
  1.9412010515957929  2.1759179276758314  3.9344866246800883   T   T   T
  6.8416985376762431  3.3432868664108821  1.0062849797184248   T   T   T
  4.8055077718985171  1.0085489889407793  1.0062849797184248   T   T   T
  0.9231056687069311  3.3432868664108821  3.3286976176620091   T   T   T
  2.9592964344846564  1.0085489889407793  3.3286976176620091   T   T   T
  0.9231056687069311  1.0085489889407793  7.6636802150424401   T   T   T
  2.9592964344846564  3.3432868664108821  7.6636802150424401   T   T   T
  6.8416985376762431  1.0085489889407793  5.3412675770988614   T   T   T
  4.8055077718985171  3.3432868664108821  5.3412675770988614   T   T   T