Si 
 1.0000000000000000
     6.6389343567241799   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    6.6389343567241799    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    6.6389343567241799
 Si 
  12
Selective dynamics
Cartesian
  1.6597335891810454  0.0000000000000000  3.3194671783620908   T   T   T
  4.9792007675431353  0.0000000000000000  3.3194671783620908   T   T   T
  3.3194671783620908  1.6597335891810454  0.0000000000000000   T   T   T
  3.3194671783620908  4.9792007675431353  0.0000000000000000   T   T   T
 -0.0000000000000000  3.3194671783620908  1.6597335891810456   T   T   T
 -0.0000000000000000  3.3194671783620908  4.9792007675431353   T   T   T
 -0.0000000000000000  1.6597335891810454  3.3194671783620908   T   T   T
 -0.0000000000000000  4.9792007675431353  3.3194671783620908   T   T   T
  1.6597335891810454  3.3194671783620908  0.0000000000000000   T   T   T
  4.9792007675431353  3.3194671783620908  0.0000000000000000   T   T   T
  3.3194671783620908  0.0000000000000000  4.9792007675431353   T   T   T
  3.3194671783620908  0.0000000000000000  1.6597335891810456   T   T   T