Synthesis, Structure and Interlayer Behavior of A New Tantalate KSr2Ta3O10 with Perovskite-like Structure

Abstract

Abstract: A new tantalate compound KSr₂Ta₃O₁₀ was synthesized by solid state reaction for the first time in the ternary system K₂O SrO Ta₂O₅, and its single crystals were prepared using flux method. The chemical compositions, crystal structure, optical property, density and melting point of the new compound were characterized by EPMA, XRD, DTA and so on. KSr₂Ta₃O₁₀ crystallizes the orthorhombic system with unit cell parameters a= 0.784 4(1) nm, b =0.777 0(1) nm, c =3.012 7(1) nm and space group P2₁2₁2₁, Z =8. The structure may be described as treble perovskite sheets [KSr₂Ta₃O₁₀]^- interleaved with K⁺. Further, it was found that KSr₂Ta₃O₁₀ has intercalation phenomenon. Na⁺, Li⁺, H⁺, NH₄⁺could exchange the interlayer cations K⁺ of KSr₂Ta₃O₁₀ , and n hexylamine also could intercalate into the place between the layers of [KSr₂Ta₃O₁₀]^-.

Key words: Tantalate, Perovskite-like structure, Intercalation

CLC Number:

O614.512

TrendMD:

FANG Liang, ZHANG Hui, WU Bo-Lin, YUAN Run-Zhang . Synthesis, Structure and Interlayer Behavior of A New Tantalate KSr₂Ta₃O₁₀ with Perovskite-like Structure[J]. Chem. J. Chinese Universities, 2000, 21(11): 1639.

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Synthesis, Structure and Interlayer Behavior of A New Tantalate KSr₂Ta₃O₁₀ with Perovskite-like Structure

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