Si 
 1.0000000000000000
     6.6771105943389459    0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.6771105943389459   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    6.6771105943389459
 Si 
  12
Selective dynamics
Cartesian
  1.6692776485847363 -0.0000000000000000  3.3385552971694725   T   T   T
  5.0078329457542079 -0.0000000000000000  3.3385552971694725   T   T   T
  3.3385552971694725  1.6692776485847363 -0.0000000000000000   T   T   T
  3.3385552971694725  5.0078329457542079 -0.0000000000000000   T   T   T
  0.0000000000000000  3.3385552971694725  1.6692776485847365   T   T   T
  0.0000000000000000  3.3385552971694725  5.0078329457542079   T   T   T
  0.0000000000000000  1.6692776485847363  3.3385552971694725   T   T   T
  0.0000000000000000  5.0078329457542079  3.3385552971694725   T   T   T
  1.6692776485847363  3.3385552971694725 -0.0000000000000000   T   T   T
  5.0078329457542079  3.3385552971694725 -0.0000000000000000   T   T   T
  3.3385552971694725 -0.0000000000000000  5.0078329457542079   T   T   T
  3.3385552971694725 -0.0000000000000000  1.6692776485847365   T   T   T