Na  O Si 
 1.0000000000000000
     6.3210176912761122    0.2095657978419153    1.0043784481309073
     2.7216767078849720    5.5586389565864920    0.8834410653934038
     3.1985636865118532    3.1514948585844076   10.3866793704715441
 Na  O   Si 
   8   8   2
Selective dynamics
Cartesian
  6.5188264804451013  3.7534057710585551  0.7256585399826965   T   T   T
  5.7224316052278468  5.1662938419542757 11.5488403440131755   T   T   T
  5.4815089767564205  4.4119195754128633  8.2240206526925839   T   T   T
  6.7597491089165214  4.5077800375999573  4.0504782313033063   T   T   T
  3.3215432832724612  2.5212339850759293  5.4749739368071015   T   T   T
  8.9197148024004438  6.3984656279369005  6.7995249471887753   T   T   T
  3.6279917857193986  4.6678025602937430  2.4172465227625057   T   T   T
  8.6132662999535619  4.2518970527190874  9.8572523612333658   T   T   T
  6.6731571360071680  2.6045513003734766  2.6525007584346820   T   T   T
  5.5681009496657836  6.3151483126393639  9.6219981255611717   T   T   T
  8.2451767527124229  6.0036113748180959  4.5892832133814032   T   T   T
  3.9960813329605349  2.9160882381947322  7.6852156706144585   T   T   T
  4.6465914454221533  1.3125559458401110  1.4608115795280172   T   T   T
  7.5946666402507965  7.6071436671727168 10.8136873044678588   T   T   T
  4.2547504078941154  2.7814837410337137  3.6220378925076924   T   T   T
  7.9865076777788353  6.1382158719791109  8.6524609914881712   T   T   T
  5.2821582931772202  1.8028124843964051  2.8574312636088601   T   T   T
  6.9590997924957332  7.1168871286164377  9.4170676203870212   T   T   T