Selenite (ion)
Structure of selenite
Space-filling model of selenite
Mn, Fe(III), Ni, Co, Cu selenites
The selenite anion is a selenium oxyanion with the chemical formula SeO2−
3. It is the selenium analog of the sulfite ion, SO2−
3.
A selenite (compound) is a compound that contains this ion.
In slightly acid conditions, the hydrogenselenite ion, HSeO−
3, is formed; in more acidic conditions selenous acid, H2SeO3, exists.
Most selenite salts can be formed by heating the relevant metal oxide with selenium dioxide, e.g.:
- Na2O + SeO2 → Na2SeO3.
The boroselenites have a more complex oxyanion also including boron.
See Category:Selenites for a list.
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- Selenites
- Selenium(IV) compounds
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