Si 
 1.0000000000000000
     6.6878770944491386    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    6.6878770944491350   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    4.0357807273238731
 Si 
   8
Selective dynamics
Cartesian
  5.4491175378481191  5.4491175378481147 -0.0000000000000000   T   T   T
  1.2387595566010170  1.2387595566010159 -0.0000000000000000   T   T   T
  1.2387595566010170  5.4491175378481138 -0.0000000000000000   T   T   T
  5.4491175378481191  1.2387595566010159 -0.0000000000000000   T   T   T
  2.1051789906235503  2.1051789906235485  2.0178903636619374   T   T   T
  4.5826981038255870  4.5826981038255843  2.0178903636619374   T   T   T
  4.5826981038255870  2.1051789906235476  2.0178903636619374   T   T   T
  2.1051789906235503  4.5826981038255843  2.0178903636619374   T   T   T