Si 
 1.0000000000000000
     6.6870907509953623   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    6.6870907509953614   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.7876845797502470
 Si 
   8
Selective dynamics
Cartesian
  5.4895580406458047  5.4895580406458055 -0.0000000000000000   T   T   T
  1.1975327103495537  1.1975327103495539 -0.0000000000000000   T   T   T
  1.1975327103495537  5.4895580406458047 -0.0000000000000000   T   T   T
  5.4895580406458047  1.1975327103495539 -0.0000000000000000   T   T   T
  2.1460126651481262  2.1460126651481262  1.8938422898751237   T   T   T
  4.5410780858472348  4.5410780858472357  1.8938422898751237   T   T   T
  4.5410780858472348  2.1460126651481253  1.8938422898751237   T   T   T
  2.1460126651481262  4.5410780858472357  1.8938422898751237   T   T   T