From Wikipedia, the free encyclopedia. The chemical compound silicon dioxide, also known as silica, is the oxide of silicon, chemical formula SiO2.It is found in nature in several forms, including quartz and opal. In fact, silica has 17 crystalline forms.he chemical compound silicon dioxide, also known as silica, is the oxide of silicon, chemical formula SiO2.
Windsor is home to 217,188 people, according to the 2016 census. Windsor's population has grown by three per cent in the past five years, but the city still fell behind the national growth rate, according to data collected during the 2016 census.
Total occupied homes in Niagara Falls with people under 18 years old: Total: 22,603; Population of homes with one or more people under 18 years: 6,126; Population of family homes: 6,051; Husband-wife family: 2,390; Under 6 years only: 542; Under 6 years and 6 to 17 years: 506; 6 to 17 years only: 1,342; Other family: 3,661; Male householder, no wife present: 671