Si 
 1.0000000000000000
     6.6412945493621809   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    6.6412945493621818    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.9356202072066728
 Si 
   8
Selective dynamics
Cartesian
  5.4395292454876412  5.4395292454876421  0.0000000000000000   T   T   T
  1.2017653038745404  1.2017653038745406  0.0000000000000000   T   T   T
  1.2017653038745404  5.4395292454876412  0.0000000000000000   T   T   T
  5.4395292454876412  1.2017653038745406  0.0000000000000000   T   T   T
  2.1188819708065498  2.1188819708065503  1.9678101036033371   T   T   T
  4.5224125785556275  4.5224125785556293  1.9678101036033369   T   T   T
  4.5224125785556275  2.1188819708065494  1.9678101036033371   T   T   T
  2.1188819708065498  4.5224125785556293  1.9678101036033369   T   T   T