Si 
 1.0000000000000000
     6.7688869696994924    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    6.7688869696994924   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    6.7688869696994924
 Si 
  12
Selective dynamics
Cartesian
  1.6922217424248731 -0.0000000000000000  3.3844434848497462   T   T   T
  5.0766652272746198 -0.0000000000000000  3.3844434848497462   T   T   T
  3.3844434848497462  1.6922217424248731 -0.0000000000000000   T   T   T
  3.3844434848497462  5.0766652272746198 -0.0000000000000000   T   T   T
  0.0000000000000000  3.3844434848497462  1.6922217424248733   T   T   T
  0.0000000000000000  3.3844434848497462  5.0766652272746198   T   T   T
  0.0000000000000000  1.6922217424248731  3.3844434848497462   T   T   T
  0.0000000000000000  5.0766652272746198  3.3844434848497462   T   T   T
  1.6922217424248731  3.3844434848497462 -0.0000000000000000   T   T   T
  5.0766652272746198  3.3844434848497462 -0.0000000000000000   T   T   T
  3.3844434848497462 -0.0000000000000000  5.0766652272746198   T   T   T
  3.3844434848497462 -0.0000000000000000  1.6922217424248733   T   T   T