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Issue 10, 2018
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Rise of A-site columnar-ordered A2A′A′′B4O12 quadruple perovskites with intrinsic triple order

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Abstract

A-site-ordered AA′3B4O12 quadruple perovskites (with twelve-fold coordinated A and square-planar coordinated A′ sites) were discovered in 1967. Since then, there have been considerable research efforts to synthesize and characterize new members of such perovskites. These efforts have led to the discoveries of many interesting physical and chemical properties, such as inter-site charge transfer and disproportionation, giant dielectric constant, multiferroic properties, reentrant structural transitions and high catalytic activity. The first member of A-site columnar-ordered A2A′A′′B4O12 quadruple perovskites (with ten-fold coordinated A, square-planar coordinated A′ and tetrahedrally coordinated A′′ sites), CaFeTi2O6, was discovered in 1995, and for 19 years it was the only representative of this family. In the last few years, A2A′A′′B4O12 perovskites have experienced rapid growth. Herein, we present a brief overview of the recent developments in this field and highlight an under-investigated status and great potential of A2A′A′′B4O12, which can be prepared mainly at high pressure and high temperature. The presence of the A′′ site gives an additional degree of freedom in designing such perovskites. The A2A′A′′B4O12 perovskites are discussed in comparison with well-known AA′3B4O12 perovskites.

Graphical abstract: Rise of A-site columnar-ordered A2A′A′′B4O12 quadruple perovskites with intrinsic triple order

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Publication details

The article was received on 29 Nov 2017, accepted on 14 Jan 2018 and first published on 15 Jan 2018


Article type: Frontier
DOI: 10.1039/C7DT04490A
Citation: Dalton Trans., 2018,47, 3209-3217
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    Rise of A-site columnar-ordered A2A′A′′B4O12 quadruple perovskites with intrinsic triple order

    A. A. Belik, Dalton Trans., 2018, 47, 3209
    DOI: 10.1039/C7DT04490A

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