$Xe{F_6} + 2{H_2}O\, \to Xe{O_2}{F_2}+ \,4HF$
$Si{O_2}\, + \,2Xe{F_6}\, \to \mathop {\,2XeO{F_4}\, + \,Si{F_4}}\limits_{(Xenoneoxy\,\,\,tetra\,\,fluoride)} $