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

Tolchard, Julian, Sansom, Jonathan, Islam, Saiful and Slater, Peter (2005) Structural studies of apatite-type oxide ion conductors doped with Cobalt Dalton Transactions (7).


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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.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
Tolchard, Julian
Sansom, Jonathan
Islam, Saiful
Date : 4 March 2005
DOI : 10.1039/b418992b
Uncontrolled Keywords : apatite, solid oxide fuel cell, ionic conductor, neutron diffraction, EXAFS, XANES
Additional Information : J.R. Tolchard, J.E.H. Sansom, M.S. Islam, P.R. Slater; Dalton Trans. 2005, 1273.
Depositing User : Mr Adam Field
Date Deposited : 27 May 2010 14:43
Last Modified : 31 Oct 2017 14:02

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