The infra-red spectra of some 12-heteropolytungstates

Abstract A study of the infra-red spectra of a number of 12-heteropolytungstic acids and their salts shows two distinct types of acid. The first type consists of those with non-metals and the second type of those with transition metals (including zinc) as the central atom. The infrared spectra of the latter heteropoly acids have been related to the thermal stabilities of the acids.