O Si 
 1.0000000000000000
     3.9238417457967856   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.9238417457967856    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.9238417457967856
 O   Si 
   8   4
Selective dynamics
Cartesian
  0.9809604364491959  0.9809604364491959  0.9809604364491959   T   T   T
  2.9428813093475883  2.9428813093475883  0.9809604364491959   T   T   T
  2.9428813093475883  0.9809604364491959  2.9428813093475883   T   T   T
  0.9809604364491959  2.9428813093475883  2.9428813093475883   T   T   T
  0.9809604364491959  0.9809604364491959  2.9428813093475883   T   T   T
  2.9428813093475883  2.9428813093475883  2.9428813093475883   T   T   T
  0.9809604364491959  2.9428813093475883  0.9809604364491959   T   T   T
  2.9428813093475883  0.9809604364491959  0.9809604364491959   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.9619208728983919  1.9619208728983919   T   T   T
  1.9619208728983919  0.0000000000000000  1.9619208728983919   T   T   T
  1.9619208728983919  1.9619208728983919  0.0000000000000000   T   T   T