Si1
1.0
  20.0000000000000000    0.0000000000000000    0.0000000000000012
  -0.0000000000000013   20.5000000000000000    0.0000000000000013
   0.0000000000000000    0.0000000000000000   21.0000000000000000
Si
1
direct
   0.0000000000000000    0.0000000000000000    0.0000000000000000 Si
