Si 
 1.0000000000000000
     6.7418809657954410   -0.0000000000000000   -0.0000000000000000
     0.0000000000000000    6.7418809657954410    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    6.7418809657954410
 Si 
  12
Selective dynamics
Cartesian
  1.6854702414488603  0.0000000000000000  3.3709404828977205   T   T   T
  5.0564107243465806  0.0000000000000000  3.3709404828977205   T   T   T
  3.3709404828977205  1.6854702414488603  0.0000000000000000   T   T   T
  3.3709404828977205  5.0564107243465806  0.0000000000000000   T   T   T
  0.0000000000000000  3.3709404828977205  1.6854702414488605   T   T   T
  0.0000000000000000  3.3709404828977205  5.0564107243465806   T   T   T
  0.0000000000000000  1.6854702414488603  3.3709404828977205   T   T   T
  0.0000000000000000  5.0564107243465806  3.3709404828977205   T   T   T
  1.6854702414488603  3.3709404828977205  0.0000000000000000   T   T   T
  5.0564107243465806  3.3709404828977205  0.0000000000000000   T   T   T
  3.3709404828977205  0.0000000000000000  5.0564107243465806   T   T   T
  3.3709404828977205  0.0000000000000000  1.6854702414488605   T   T   T