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.
In contrast, the official Statistics Canada population estimate for 2001 was 31,021,300. Canada's total population enumerated by the 2006 census was 31,612,897. This count was lower than the official 1 July 2006 population estimate of 32,623,490 people. Ninety-percent of the population growth between 2001 and 2006 was concentrated in the main metropolitan areas.