Si 
 1.0000000000000000
     6.6216919793466280    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    6.6216919793466280   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    6.6216919793466280
 Si 
  12
Selective dynamics
Cartesian
  1.6554229948366570 -0.0000000000000000  3.3108459896733140   T   T   T
  4.9662689845099699 -0.0000000000000000  3.3108459896733140   T   T   T
  3.3108459896733140  1.6554229948366570 -0.0000000000000000   T   T   T
  3.3108459896733140  4.9662689845099699 -0.0000000000000000   T   T   T
  0.0000000000000000  3.3108459896733140  1.6554229948366572   T   T   T
  0.0000000000000000  3.3108459896733140  4.9662689845099699   T   T   T
  0.0000000000000000  1.6554229948366570  3.3108459896733140   T   T   T
  0.0000000000000000  4.9662689845099699  3.3108459896733140   T   T   T
  1.6554229948366570  3.3108459896733140 -0.0000000000000000   T   T   T
  4.9662689845099699  3.3108459896733140 -0.0000000000000000   T   T   T
  3.3108459896733140 -0.0000000000000000  4.9662689845099699   T   T   T
  3.3108459896733140 -0.0000000000000000  1.6554229948366572   T   T   T