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.
Essex County is the southernmost county and census division in Canada located in Southwestern Ontario. The administrative seat is the Town of Essex. Essex County has a population of 177,720, and the census division including Windsor and Pelee has a population of 388,782 as of the Canada 2011 Census, making it one of the most populous divisions in Ontario.