Tin (IV) oxide, also known by the systematic name
stannic oxide in the older notation, is the
inorganic compound with the
formula SnO2. It is not named tin dioxide because Tin is a Type II Metal, and so is named Tin (IV) Oxide by nomenclature. The mineral form of SnO
2 is called
cassiterite, and this is the main ore of
tin. With many other names (see infobox), this
oxide of tin is the most important raw material in tin chemistry. This colourless,
diamagnetic solid is
amphoteric.