In group 16 silicon dioxide can be a quite common compound that commonly takes place as sand or quartz. SiO2 is tetrahedral with each silicon atom surrounded by 4 oxygen atoms. Many crystalline types exist Along with the tetrahedra associated with variety a polymeric chain. Illustrations are tridymite and cristobalite. https://3dprinter93603.ageeksblog.com/37394364/sic-ceramic-things-to-know-before-you-buy