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

AuthorsOrera, Alodia; Sanjuán, M. L.; Slater, P. R.
Issue Date2011
PublisherRoyal Society of Chemistry (Great Britain)
CitationDalton Transactions 40(15): 3903-3908 (2011)
AbstractHigh 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.
Descriptionet al.
Publisher version (URL)http://dx.doi.org/10.1039/c0dt00690d
Identifiersdoi: 10.1039/c0dt00690d
issn: 1477-9226
e-issn: 1477-9234
Appears in Collections:(ICMA) Artículos
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