Resumo

BIZETO, Marcos A.; CHRISTINO, Fernando P.; TAVARES, Marina F. M.  e  CONSTANTINO, Vera R. L.. Structural aspects related to the ion exchange process in layered niobate K₄Nb₆O₁₇. Quím. Nova [online]. 2006, vol.29, n.6, pp. 1215-1220. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422006000600013.

The niobate with formula K₄Nb₆O₁₇ has a layered structure formed by stacked negative sheets and exchangeable cations in the interlayer region. In this study we discuss some structural aspects related to the ion exchange in layered hexaniobate based on X-ray diffractometry and vibrational Raman spectroscopy data. Hexaniobate has two distinct interlayer regions and the potassium ions of one interlayer in particular are preferably exchanged by other cations, leading to an interstratified material.

Palavras-chave : K₄Nb₆O₁₇; ion exchange; intercalation.