Atomic-scale mechanistic features of oxide ion conduction in apatite-type germanates.
نویسندگان
چکیده
Atomistic modelling studies of the apatite-type oxide ion conductor La9.33(GeO4)6O2 show that a key role of the O4 channel oxygen atoms appears to be as a reservoir for the creation of interstitial oxide ion defects, while the migration of these defects proceeds via the GeO4 tetrahedra.
منابع مشابه
Synthesis of hexagonal lanthanum germanate apatites through site selective isovalent doping with yttrium
2 Abstract Apatite-type lanthanum silicates/germanates have been attracting considerable interest as a new class of oxide ion conductors, whose conductivity is mediated by oxide ion interstititials. For the germanates, it has been shown that, depending on composition, the cell can be either hexagonal or triclinic, with evidence for reduced low temperature conductivities for the latter, attribut...
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عنوان ژورنال:
- Chemical communications
دوره 6 شماره
صفحات -
تاریخ انتشار 2008