Si 
 1.0000000000000000
     6.8234410147103919   -0.0000000000000000    0.0000000000000000
     0.0000000000000000    6.8234410147103928    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.9337920483112887
 Si 
   8
Selective dynamics
Cartesian
  5.5750561058659471  5.5750561058659454  0.0000000000000000   T   T   T
  1.2483849088444452  1.2483849088444454  0.0000000000000000   T   T   T
  1.2483849088444452  5.5750561058659445  0.0000000000000000   T   T   T
  5.5750561058659471  1.2483849088444454  0.0000000000000000   T   T   T
  2.1633355985107499  2.1633355985107494  1.9668960241556444   T   T   T
  4.6601054161996389  4.6601054161996407  1.9668960241556444   T   T   T
  4.6601054161996389  2.1633355985107485  1.9668960241556444   T   T   T
  2.1633355985107499  4.6601054161996407  1.9668960241556444   T   T   T