High pressure synthesis, crystal structure and physical properties of a new Ni(II) perovskite BiNiO3

Shintaro Ishiwata; Masaki Azuma; Mikio Takano; Eiji Nishibori; Masaki Takata; Makoto Sakata; Kenichi Kato

doi:10.1039/b206022a

High pressure synthesis, crystal structure and physical properties of a new Ni(II) perovskite BiNiO₃

Shintaro Ishiwata, Masaki Azuma, Mikio Takano, Eiji Nishibori, Masaki Takata, Makoto Sakata, Kenichi Kato

Research output: Contribution to journal › Article › peer-review

116 Citations (Scopus)

Abstract

A new triclinic perovskite, BiNiO₃, has been synthesized at a high pressure of 6 GPa in an oxidizing atmosphere. Structure refinements based on synchrotron X-ray powder diffraction and bond-valence calculations revealed a disproportionation of the Bi ions into Bi³⁺ and Bi⁵⁺, both being located in distorted oxygen octahedra. Because of the presence of Bi⁵⁺, the oxidation state of Ni was +2, rather than +3 as had been expected; BiNiO₃ thus showed insulating behavior with localized spins of S = 1.

Original language	English
Pages (from-to)	3733-3737
Number of pages	5
Journal	Journal of Materials Chemistry
Volume	12
Issue number	12
DOIs	https://doi.org/10.1039/b206022a
Publication status	Published - 2002 Dec 1
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Chemistry

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title = "High pressure synthesis, crystal structure and physical properties of a new Ni(II) perovskite BiNiO3",

abstract = "A new triclinic perovskite, BiNiO3, has been synthesized at a high pressure of 6 GPa in an oxidizing atmosphere. Structure refinements based on synchrotron X-ray powder diffraction and bond-valence calculations revealed a disproportionation of the Bi ions into Bi3+ and Bi5+, both being located in distorted oxygen octahedra. Because of the presence of Bi5+, the oxidation state of Ni was +2, rather than +3 as had been expected; BiNiO3 thus showed insulating behavior with localized spins of S = 1.",

author = "Shintaro Ishiwata and Masaki Azuma and Mikio Takano and Eiji Nishibori and Masaki Takata and Makoto Sakata and Kenichi Kato",

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T1 - High pressure synthesis, crystal structure and physical properties of a new Ni(II) perovskite BiNiO3

AU - Ishiwata, Shintaro

AU - Azuma, Masaki

AU - Takano, Mikio

AU - Nishibori, Eiji

AU - Takata, Masaki

AU - Sakata, Makoto

AU - Kato, Kenichi

PY - 2002/12/1

Y1 - 2002/12/1

N2 - A new triclinic perovskite, BiNiO3, has been synthesized at a high pressure of 6 GPa in an oxidizing atmosphere. Structure refinements based on synchrotron X-ray powder diffraction and bond-valence calculations revealed a disproportionation of the Bi ions into Bi3+ and Bi5+, both being located in distorted oxygen octahedra. Because of the presence of Bi5+, the oxidation state of Ni was +2, rather than +3 as had been expected; BiNiO3 thus showed insulating behavior with localized spins of S = 1.

AB - A new triclinic perovskite, BiNiO3, has been synthesized at a high pressure of 6 GPa in an oxidizing atmosphere. Structure refinements based on synchrotron X-ray powder diffraction and bond-valence calculations revealed a disproportionation of the Bi ions into Bi3+ and Bi5+, both being located in distorted oxygen octahedra. Because of the presence of Bi5+, the oxidation state of Ni was +2, rather than +3 as had been expected; BiNiO3 thus showed insulating behavior with localized spins of S = 1.

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