Si 
 1.0000000000000000
     6.6389343567241790    0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    6.6389343567241790   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    6.6389343567241790
 Si 
  12
Selective dynamics
Cartesian
  1.6597335891810447 -0.0000000000000000  3.3194671783620895   T   T   T
  4.9792007675431345 -0.0000000000000000  3.3194671783620895   T   T   T
  3.3194671783620895  1.6597335891810447 -0.0000000000000000   T   T   T
  3.3194671783620895  4.9792007675431345 -0.0000000000000000   T   T   T
 -0.0000000000000000  3.3194671783620895  1.6597335891810450   T   T   T
 -0.0000000000000000  3.3194671783620895  4.9792007675431345   T   T   T
 -0.0000000000000000  1.6597335891810447  3.3194671783620895   T   T   T
 -0.0000000000000000  4.9792007675431345  3.3194671783620895   T   T   T
  1.6597335891810447  3.3194671783620895 -0.0000000000000000   T   T   T
  4.9792007675431345  3.3194671783620895 -0.0000000000000000   T   T   T
  3.3194671783620895 -0.0000000000000000  4.9792007675431345   T   T   T
  3.3194671783620895 -0.0000000000000000  1.6597335891810450   T   T   T