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[An−1NbnO3n+1], and their indexed X-ray powder diffraction data were first reported in the paper.
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