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Apatite germanates doped with tungsten: Synthesis, structure, and conductivity

Lookup NU author(s): Dr Stevin PramanaORCiD

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Abstract

High oxygen content apatite germanates, La10Ge 6-xWxO27+x, have been prepared by doping on the Ge site with W. In addition to increasing the oxygen content, this doping strategy is shown to result in stabilisation of the hexagonal lattice, and yield high conductivities. Structural studies of La10Ge 5.5W0.5O27.5 show that the interstitial oxygen sites are associated to a different degree with the Ge/WO4 tetrahedra, leading to five coordinate Ge/W and significant disorder for the oxygen sites associated with these units. Raman spectroscopy studies suggest that in the case of the WO5 units, the interstitial oxygen is more tightly bonded and therefore not as mobile as in the case of the GeO5 units, thus not contributing significantly to the conduction process. © 2011 The Royal Society of Chemistry.

Publication metadata

Author(s): Orera A, Baikie T, Kendrick E, Shin JF, Pramana S, Smith R, White TJ, Sanjuan ML, Slater PR

Publication type: Article

Publication status: Published

Journal: Dalton Transactions

Year: 2011

Volume: 40

Issue: 15

Pages: 3903-3908

Print publication date: 21/04/2011

Online publication date: 30/09/2010

ISSN (print): 1477-9226

ISSN (electronic): 1477-9234

Publisher: Royal Society of Chemistry

URL: https://doi.org/10.1039/c0dt00690d

DOI: 10.1039/c0dt00690d

PubMed id: 20886149

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