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Most websites (including Wikipedia) say that the anion MoO42- is called a molybdate ion, although some websites use molybdenate instead. Which one is correct, and if one of them is correct, is the other term still allowed?

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According to Table X of the Red Book (‘Nomenclature of Inorganic Chemistry – IUPAC recommendations 2005’), the anion name for molybdenum is molybdate.

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  • $\begingroup$ Does the Table X of the Red Book say if molybdenate is allowed? $\endgroup$ Jul 6 at 17:46
  • $\begingroup$ @Praseodymium-141 "molybdenate" is not mentioned in the Red Book. $\endgroup$
    – Loong
    Jul 6 at 18:04
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If you do a Google ngram of the terms 'molybdate' and 'molybdenate', you will find 'molybdate' standing out.

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No one known why the 'en' was kept when you can simply shorten it to molybd-ate instead of molybden-ate (like phosph-ate and not phosphor-ate). However, the latter didn't got totally eliminated. Some research papers(here is a recent example) and textbooks still uses 'molydenate'. The following image is from a physics textbook published in 2020.

enter image description here

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  • $\begingroup$ Add "b" in molydenate $\endgroup$
    – Ritil
    Jul 11 at 21:14

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