Synthesis and structural characterization of a novel Sillén – Aurivillius bismuth oxyhalide, PbBi3VO7.5Cl, and its derivatives

Dmitri O. Charkin, Igor V. Plokhikh, Sergey M. Kazakov, Stepan N. Kalmykov, Victor S. Akinfiev, Anatoly V. Gorbachev, Maria Batuk, Artem M. Abakumov, Yury A. Teterin, Konstantin I. Maslakov, Anton Yu Teterin, Kirill E. Ivanov

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Abstract

A new Sillén – Aurivillius family of layered bismuth oxyhalides has been designed and successfully constructed on the basis of PbBiO2X (X = halogen) synthetic perites and γ-form of Bi2VO5.5 solid electrolyte. This demonstrates, for the first time, the ability of the latter to serve as a building block in construction of mixed-layer structures. The parent compound PbBi3VO7.5-δCl (δ ≤ 0.05) has been investigated by powder XRD, TEM, XPS methods and magnetic susceptibility measurements. An unexpected but important condition for the formation of the mixed-layer structure is partial (ca. 5%) reduction of VV into VIV which probably suppresses competitive formation of apatite-like Pb – Bi vanadates. This reduction also stabilizes the γ polymorphic form of Bi2VO5.5 not only in the intergrowth structure, but in Bi2V1-xMxO5.5-y (M = Nb, Sb) solid solutions.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalSolid State Sciences
Volume75
DOIs
Publication statusPublished - Jan 2018
Externally publishedYes

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