Synthesis and characterization of a new triple-layered perovskite KSr₂Nb₃O₁₀ and its protonated compounds

Abstract

New layered perovskites, KSr₂Nb₃O₁₀ and two new protonated niobates HSr₂Nb₃O₁₀·1.2H₂O and HSr₂Nb₃O₁₀, were synthesized by solid state reaction and ion-exchange reaction. These new compounds were characterized by EPMA, AAS, XRD, IR, DTA and so on. The structure may be described as treble perovskite sheets [Sr₂Nb₃O₁₀]⁻ interleaved with K⁺, H₃O⁺ or H⁺. These new compounds are new members of the Dion-Jacobsonseries with n=3 for the general formula M[A_n−1Nb_nO_3n+1], and their indexed X-ray powder diffraction data were first reported in the paper.

Keywords

niobate / perovskite structure / ion exchange / protonated

References

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