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.
Demographics of Canada 2016. As of 1 January 2017, the population of Canada was estimated to be 36 508 003 people. This is an increase of 1.03 % (373 987 people) compared to population of 36 134 016 the year before. In 2016 the natural increase was positive, as the number of births exceeded the number of deaths by 131 528.