Structural studies of apatite-type oxide ion conductors doped with cobalt

J R Tolchard; J E H Sansom; M S Islam; P R Slater

doi:10.1039/b418992b

Structural studies of apatite-type oxide ion conductors doped with cobalt

J R Tolchard, J E H Sansom, M S Islam, P R Slater

Department of Chemistry

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43 Citations (SciVal)

Abstract

A series of Co doped lanthanum silicate apatite-type phases, La9.83Si4.5Co1.5O26, La9.66Si5CoO26, La10Si5CoO26.5 and La8BaCoSi6O26, have been synthesised, and neutron diffraction, EXAFS and XANES used to investigate their structures in detail. All compositions were shown to possess the hexagonal apatite structure, and the results confirmed that cobalt can be doped onto both the La and Si sites within the structure depending on the starting composition. The Co doping is shown to cause considerable local distortions within the apatite structure. In the case of Si site doping two compositions showed anisotropic peak broadening, which has been attributed to incommensurate ordering of oxygen within the apatite channels.

Original language	English
Pages (from-to)	1273-1280
Number of pages	8
Journal	Dalton Transactions
Issue number	7
DOIs	https://doi.org/10.1039/b418992b
Publication status	Published - 2005

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ID number: ISI:000227792200018

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10.1039/b418992b

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title = "Structural studies of apatite-type oxide ion conductors doped with cobalt",

abstract = "A series of Co doped lanthanum silicate apatite-type phases, La9.83Si4.5Co1.5O26, La9.66Si5CoO26, La10Si5CoO26.5 and La8BaCoSi6O26, have been synthesised, and neutron diffraction, EXAFS and XANES used to investigate their structures in detail. All compositions were shown to possess the hexagonal apatite structure, and the results confirmed that cobalt can be doped onto both the La and Si sites within the structure depending on the starting composition. The Co doping is shown to cause considerable local distortions within the apatite structure. In the case of Si site doping two compositions showed anisotropic peak broadening, which has been attributed to incommensurate ordering of oxygen within the apatite channels.",

author = "Tolchard, {J R} and Sansom, {J E H} and Islam, {M S} and Slater, {P R}",

note = "ID number: ISI:000227792200018",

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doi = "10.1039/b418992b",

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pages = "1273--1280",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

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T1 - Structural studies of apatite-type oxide ion conductors doped with cobalt

AU - Tolchard, J R

AU - Sansom, J E H

AU - Islam, M S

AU - Slater, P R

N1 - ID number: ISI:000227792200018

PY - 2005

Y1 - 2005

N2 - A series of Co doped lanthanum silicate apatite-type phases, La9.83Si4.5Co1.5O26, La9.66Si5CoO26, La10Si5CoO26.5 and La8BaCoSi6O26, have been synthesised, and neutron diffraction, EXAFS and XANES used to investigate their structures in detail. All compositions were shown to possess the hexagonal apatite structure, and the results confirmed that cobalt can be doped onto both the La and Si sites within the structure depending on the starting composition. The Co doping is shown to cause considerable local distortions within the apatite structure. In the case of Si site doping two compositions showed anisotropic peak broadening, which has been attributed to incommensurate ordering of oxygen within the apatite channels.

AB - A series of Co doped lanthanum silicate apatite-type phases, La9.83Si4.5Co1.5O26, La9.66Si5CoO26, La10Si5CoO26.5 and La8BaCoSi6O26, have been synthesised, and neutron diffraction, EXAFS and XANES used to investigate their structures in detail. All compositions were shown to possess the hexagonal apatite structure, and the results confirmed that cobalt can be doped onto both the La and Si sites within the structure depending on the starting composition. The Co doping is shown to cause considerable local distortions within the apatite structure. In the case of Si site doping two compositions showed anisotropic peak broadening, which has been attributed to incommensurate ordering of oxygen within the apatite channels.

U2 - 10.1039/b418992b

DO - 10.1039/b418992b

M3 - Article

SN - 1477-9226

SP - 1273

EP - 1280

JO - Dalton Transactions

JF - Dalton Transactions

IS - 7

ER -

Structural studies of apatite-type oxide ion conductors doped with cobalt

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