On the Existence of Hydrotalcite-Like Phases in the Absence of Trivalent Cations

✍ Scribed by P.Vishnu Kamath; G.Helen Annal Therese; J. Gopalakrishnan

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 218 KB
• Volume: 128
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1996.7144

✦ Synopsis

Hydroxides of nickel(II) and cobalt(II) are hydrotalcite-like phases, possessing a layered double hydroxide (LDH) structure even though there are no trivalent cations in the lattice. While the LDHs acquire a positive charge on the hydroxide layers by the incorporation of trivalent cations, we suggest that the -hydroxides acquire a positive charge by partial protonation of the hydroxyl ions according to the equation

As in the LDHs, charge balance is restored by the incorporation of anions in the interlayer region.