<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Tin dioxide (tin (IV) oxide), also known as stannic oxide, is the inorganic compound with the formula SnO . The mineral form of SnO is called cassiterite, and this is the main ore of tin . With many other names, this oxide of tin is the most important raw material in tin chemistry . It is a colourless, diamagnetic, amphoteric solid . </P> <P> Tin (IV) oxide crystallises with the rutile structure . As such the tin atoms are six coordinate and the oxygen atoms three coordinate . SnO is usually regarded as an oxygen - deficient n - type semiconductor . </P>

What is the formula of the oxide of tin sample
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