Synthesis, proton exchange, and topochemical dehydration of new Ruddlesden-Popper tantalates and titanotantalates

Raymond E. Schaak; Thomas E. Mallouk

doi:10.1006/jssc.2000.8890

Synthesis, proton exchange, and topochemical dehydration of new Ruddlesden-Popper tantalates and titanotantalates

Raymond E. Schaak, Thomas E. Mallouk

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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). K₂SrLaTi₂-TaO₁₀ · 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. (C) 2000 Acdemic Press.

Original language	English (US)
Pages (from-to)	46-54
Number of pages	9
Journal	Journal of Solid State Chemistry
Volume	155
Issue number	1
DOIs	https://doi.org/10.1006/jssc.2000.8890
State	Published - 2000

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1006/jssc.2000.8890

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title = "Synthesis, proton exchange, and topochemical dehydration of new Ruddlesden-Popper tantalates and titanotantalates",

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). K2SrLaTi2-TaO10 · 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. (C) 2000 Acdemic Press.",

author = "Schaak, {Raymond E.} and Mallouk, {Thomas E.}",

note = "Funding Information: This work was supported by National Science Foundation Grant CHE-9529202. This material is based upon work supported under a National Science Foundation Graduate Fellowship. T.E.M. thanks Professor Honig for an inspiring late night tour of the Purdue University skull melter, a place where &&real{\textquoteright}{\textquoteright} solid state chemistry is done.",

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PY - 2000

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N2 - 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). K2SrLaTi2-TaO10 · 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. (C) 2000 Acdemic Press.

AB - 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). K2SrLaTi2-TaO10 · 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. (C) 2000 Acdemic Press.

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Synthesis, proton exchange, and topochemical dehydration of new Ruddlesden-Popper tantalates and titanotantalates

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