A general synthetic procedure for heteropolyniobates

May Nyman, François Bonhomme, Todd M. Alam, Mark A. Rodriguez, Brian R. Cherry, James L. Krumhansl, Tina M. Nenoff, Amy M. Sattler

Research output: Contribution to journalArticlepeer-review

287 Scopus citations


The heteropolyanions of W, Mo, and V, which have found numerous applications, are formed simply by acidification of solutions of their oxoanions. Under similar conditions, these oxoanion precursors are not available for Nb, and Nb-oxo chemistry is dominated by formation of the Lindquist ion [Nb6O19]8- only. However, heteropolyniobate formation is favored in hydrothermal reactions of aqueous, alkaline precursor mixtures. Here we give two examples of heteropolyniobates formed by this general reaction type: K12[Ti2O2] [SiNb12O40]·16H2O [1], which contains chains of silicododecaniobate Keggin ions, and Na14[H2Si4Nb 16O56]·45.5H2O [2], a new heteropolyanion structure type.

Original languageEnglish (US)
Pages (from-to)996-998
Number of pages3
Issue number5583
StatePublished - Aug 9 2002

ASJC Scopus subject areas

  • General


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