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 2011, the enumerated population of Ontario was 12,851,821 which represents a change of 5.7% from 2006. This compares to the national average of 5.9%. The land area of Ontario is 908,607.67 square kilometres with a population density of 14.1 persons per square kilometre. This compares to the national land area of 8,965,121.42 square kilometres with a population density of 3.7 persons per square kilometre.