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Elsevier, Journal of Solid State Chemistry, 1(155), p. 46-54

DOI: 10.1006/jssc.2000.8890

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Synthesis, Proton Exchange, and Topochemical Dehydration of New Ruddlesden–Popper Tantalates and Titanotantalates

Journal article published in 2000 by Raymond E. Schaak, H. Zur Loye ORCID, Thomas E. Mallouk ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Several new ion-exchangeable Ruddlesden–Popper phases were synthesized and characterized. K2CaNaTa3O10, which crystallizes in space group I4/mmm and has lattice constants of a=3.9185(1) and c=29.519(2), is the first all-tantalum(V) analogue of K2La2Ti3O10. K2Ca2Ta2TiO10 immediately hydrates in air to K2Ca2Ta2TiO10·0.8H2O, which belongs to space group P4/mmm with a=3.8903(1) and c=16.709(1). K2SrLaTi2TaO10·2H2O, which contains a large perovskite impurity, also crystallizes in space group P4/mmm and has lattice constants of a=3.9028(3) and c=16.896(2). All of the phases undergo ion exchange in dilute acid to form the corresponding solid acids. The solid acids topochemically dehydrate around 500°C to form A-site defective cubic perovskites.