Synthesis and characterization of perovskite-type CaPbO3

Ayako Yamamoto; Nellie Khasanova; Xiao Jing Wu; Keiichi Tanabe

doi:10.1016/s0167-2738(98)00059-9

Synthesis and characterization of perovskite-type CaPbO₃

Ayako Yamamoto, Nellie Khasanova, Xiao Jing Wu, Keiichi Tanabe

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

3 Citations (Scopus)

Abstract

We have synthesized a new perovskite-type compound with nominal composition CaPbO3 under about 6 GPa using a cubic-anvil-type apparatus from a mixed powder of high-purity CaO and PbO₂. The XRD pattern was indexed on the basis of an orthorhombic unit cell with a = 5.667(1) Å, b = 5.879(1) Å and c = 8.147(2) Å. This compound has a distorted perovskite-type structure, while two previously reported types of CaPbO₃ have a fluorite-type structure and an ilmenate-type structure. EDX analysis and the unit cell parameters suggest a deficiency in the Ca site. The electrical resistivity of this compound at room temperature was very high ( > 10⁵ Ω cm) in contrast to the metallic and semiconducting conductivity of BaPbO₃ and SrPbO₃, respectively.

Original language	English
Pages (from-to)	333-336
Number of pages	4
Journal	Solid State Ionics
Volume	108
Issue number	1-4
DOIs	https://doi.org/10.1016/s0167-2738(98)00059-9
Publication status	Published - 1998 May 1
Externally published	Yes

Keywords

Ca-Pb-O
Crystal structure
High-pressure synthesis

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Synthesis and characterization of perovskite-type CaPbO3",

abstract = "We have synthesized a new perovskite-type compound with nominal composition CaPbO3 under about 6 GPa using a cubic-anvil-type apparatus from a mixed powder of high-purity CaO and PbO2. The XRD pattern was indexed on the basis of an orthorhombic unit cell with a = 5.667(1) {\AA}, b = 5.879(1) {\AA} and c = 8.147(2) {\AA}. This compound has a distorted perovskite-type structure, while two previously reported types of CaPbO3 have a fluorite-type structure and an ilmenate-type structure. EDX analysis and the unit cell parameters suggest a deficiency in the Ca site. The electrical resistivity of this compound at room temperature was very high ( > 105 Ω cm) in contrast to the metallic and semiconducting conductivity of BaPbO3 and SrPbO3, respectively.",

keywords = "Ca-Pb-O, Crystal structure, High-pressure synthesis",

author = "Ayako Yamamoto and Nellie Khasanova and Wu, {Xiao Jing} and Keiichi Tanabe",

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T1 - Synthesis and characterization of perovskite-type CaPbO3

AU - Yamamoto, Ayako

AU - Khasanova, Nellie

AU - Wu, Xiao Jing

AU - Tanabe, Keiichi

PY - 1998/5/1

Y1 - 1998/5/1

N2 - We have synthesized a new perovskite-type compound with nominal composition CaPbO3 under about 6 GPa using a cubic-anvil-type apparatus from a mixed powder of high-purity CaO and PbO2. The XRD pattern was indexed on the basis of an orthorhombic unit cell with a = 5.667(1) Å, b = 5.879(1) Å and c = 8.147(2) Å. This compound has a distorted perovskite-type structure, while two previously reported types of CaPbO3 have a fluorite-type structure and an ilmenate-type structure. EDX analysis and the unit cell parameters suggest a deficiency in the Ca site. The electrical resistivity of this compound at room temperature was very high ( > 105 Ω cm) in contrast to the metallic and semiconducting conductivity of BaPbO3 and SrPbO3, respectively.

AB - We have synthesized a new perovskite-type compound with nominal composition CaPbO3 under about 6 GPa using a cubic-anvil-type apparatus from a mixed powder of high-purity CaO and PbO2. The XRD pattern was indexed on the basis of an orthorhombic unit cell with a = 5.667(1) Å, b = 5.879(1) Å and c = 8.147(2) Å. This compound has a distorted perovskite-type structure, while two previously reported types of CaPbO3 have a fluorite-type structure and an ilmenate-type structure. EDX analysis and the unit cell parameters suggest a deficiency in the Ca site. The electrical resistivity of this compound at room temperature was very high ( > 105 Ω cm) in contrast to the metallic and semiconducting conductivity of BaPbO3 and SrPbO3, respectively.

KW - Ca-Pb-O

KW - Crystal structure

KW - High-pressure synthesis

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