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.
New Windsor, New York. New Windsor, New York. New Windsor is a town in Orange County, New York, United States. The Town of New Windsor is in the eastern part of the county, bordering the Town of Newburgh and the City of Newburgh. The population was estimated at 25,244 in 2010 by the US Census. The National Purple Heart Hall of Honor is located on Route 300 in the Town of New Windsor.