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.
As of the 2010 census, the city had a total population of 50,193, down from the 55,593 recorded in the 2000 census. It is adjacent to the Niagara River, across from the city of Niagara Falls, Ontario, and named after the famed Niagara Falls which they share.