Si 
 1.0000000000000000
     6.8337306638165503    0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.8337306638165503    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    6.8337306638165503
 Si 
  12
Selective dynamics
Cartesian
  1.7084326659541376  0.0000000000000000  3.4168653319082751   T   T   T
  5.1252979978624129  0.0000000000000000  3.4168653319082751   T   T   T
  3.4168653319082751  1.7084326659541376  0.0000000000000000   T   T   T
  3.4168653319082751  5.1252979978624129  0.0000000000000000   T   T   T
 -0.0000000000000000  3.4168653319082751  1.7084326659541378   T   T   T
 -0.0000000000000000  3.4168653319082751  5.1252979978624129   T   T   T
 -0.0000000000000000  1.7084326659541376  3.4168653319082751   T   T   T
 -0.0000000000000000  5.1252979978624129  3.4168653319082751   T   T   T
  1.7084326659541376  3.4168653319082751  0.0000000000000000   T   T   T
  5.1252979978624129  3.4168653319082751  0.0000000000000000   T   T   T
  3.4168653319082751  0.0000000000000000  5.1252979978624129   T   T   T
  3.4168653319082751  0.0000000000000000  1.7084326659541378   T   T   T