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Ole Henry Norback

Nomenclature - Lanthanoids vs Lanthanides (and Actinides vs Actinoids)

Bradley Dichter  Follow

According to p 52, Nomenclature of Inorganic Chemistry: IUPAC Recommendations 2005 (‘Red Book’):

The ending ‘ide’ normally indicates a negative ion, and therefore lanthanoid and actinoid are preferred to lanthanide and actinide.

In practice this is almost never followed, and consequently both terms are (for all intents and purposes) interchangeable, unless the context demands a differentiation.

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Jon’s political corner  Follow
Let me just add that lanthanide/lanthanoid anions do not exist (at least under any reasonable conditions) so there is no concern of confusion.More
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