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tellurate
In chemistry tellurate is a compound containing an oxyanion of tellurium where tellurium has an oxidation number of +6. In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central tellurium atom.〔(Nomenclature of Inorganic Chemistry IUPAC Recommendations 2005 ) - Full text (PDF)〕
==Tellurium oxyanions==
Historically the name tellurate was only applied to oxyanions of tellurium with oxidation number +6, formally derived from telluric acid Te(OH)6, and the name tellurite referred to oxyanions of tellurium with oxidation number +4, formally derived from tellurous acid (HO)2TeO and these names are in common use. However tellurate and tellurite are often referred to as tellurate(VI) and tellurate(IV) respectively in line with IUPAC renaming recommendtaions.〔
The metatellurate ion is TeO42− and the orthotellurate ion is TeO66−. Other oxyanions include pentaoxotellurate, TeO54−, ditellurate, Te2O108−〔Wells A.F. (1984) ''Structural Inorganic Chemistry'' 5th edition Oxford Science Publications ISBN 0-19-855370-6〕 and polymeric anions with 6 coordinate tellurium such as (TeO54−)n.
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