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Cation ordering in Li containing garnets: synthesis and structural characterisation of the tetragonal system, Li(7)La(3)Sn(2)O(12)

Percival, JD, Kendrick, E, Smith, RI and Slater, PR (2009) Cation ordering in Li containing garnets: synthesis and structural characterisation of the tetragonal system, Li(7)La(3)Sn(2)O(12) Dalton Transactions: an international journal of inorganic chemistry (26), 10.1039/b9. pp. 5177-5181.

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Abstract

In this paper we report synthesis, conductivity and structural data for the novel tetragonal garnet-related system, Li(7)La(3)Sn(2)O(12). Neutron diffraction data shows that the tetragonal distortion is related to ordering of Li in three sites within the structure to ensure no short Li-Li interactions. Consistent with the ordered nature of the Li ions, the conductivity is low, with a high activation energy. The results are relevant to related highly conducting cubic garnets, Li(5+x)Ln(3-x)A(x)M(2)O(12) (Ln = rare earth, A = alkaline earth; M = Nb, Ta, Sb), showing how a high Li content can be accommodated by Li ordering within the garnet structure, supporting previous suggestions by Cussen for the cubic garnets, who proposed the presence of local ordering/clustering of Li in tetrahedral and "octahedral" sites to limit unfavourable short Li-Li interactions.

Item Type: Article
Authors :
NameEmailORCID
Percival, JDjulia.percival@surrey.ac.ukUNSPECIFIED
Kendrick, EUNSPECIFIEDUNSPECIFIED
Smith, RIUNSPECIFIEDUNSPECIFIED
Slater, PRUNSPECIFIEDUNSPECIFIED
Date : 9 April 2009
Identification Number : 10.1039/B907331K
Uncontrolled Keywords : lithium ion conductors, garnet
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:21
Last Modified : 17 May 2017 12:21
URI: http://epubs.surrey.ac.uk/id/eprint/834990

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