O Si 
 1.0000000000000000
     5.0017125808239085   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    5.0017125808239058   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    6.6336308918240539
 O   Si 
   8   4
Selective dynamics
Cartesian
  1.1785398478994789  0.6242644814291728  1.2390033793880191   T   T   T
  3.8231727329244998  4.3774480993947691  4.5558188253001939   T   T   T
  1.8765918089827904  3.6793961383114131  2.8974111023441149   T   T   T
  3.1251207718411855  1.3223164425124814  6.2142265482562280   T   T   T
  1.3223164425125080  3.1251207718411025  0.4194043435680336   T   T   T
  3.6793961383114664  1.8765918089827660  3.7362197894801641   T   T   T
  0.6242644814291876  1.1785398478994766  5.3946275124363012   T   T   T
  4.3774480993948393  3.8231727329244141  2.0778120665241029   T   T   T
  1.5888421250955234  1.5888421250954965 -0.0000000000000000   T   T   T
  3.4128704557284593  3.4128704557284144  3.3168154459122015   T   T   T
  0.9120141653164736  4.0896984155074341  1.6584077229561007   T   T   T
  4.0896984155075176  0.9120141653164632  4.9752231688681841   T   T   T