In group 16 silicon dioxide is actually a very common compound that commonly happens as sand or quartz. SiO2 is tetrahedral with Each individual silicon atom surrounded by 4 oxygen atoms. Many crystalline types exist While using the tetrahedra associated with form a polymeric chain. Illustrations are tridymite and cristobalite. https://amorphousboronpowder04691.wikienlightenment.com/8234021/5_essential_elements_for_advanced_ceramics