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- W2326547462 abstract "The Ln4[Ga2(1-x)Ge2xO7+x□1-x]O2 (Ln = La, Nd, Gd; x ≤ 0.4) compounds have been prepared first by solid-state reaction and then by a new regenerative sol−gel method which allows their sintering. They exhibit a Cuspidine-like structure. Upon substituting Ge4+ for Ga3+, the Cuspidine structure is maintained up to x = 0.4. For x ≥ 0.15 a 1D modulation of the structure was observed and analyzed as driven by composition. The Ge4+ substitution for Ga3+ with concomitant filling of oxygen vacancies is beneficial to the anionic conductivity which increases rather regularly with x to reach 10-3 S/cm at 800 °C for x = 0.4 and Ln = Nd. Conductivity measurements on Ln4[Ga2(1-x)Ge2xO7+x□1-x]O2 (Ln = La, Nd, Gd) compounds with a fixed Ge content (x = 0.2) show a clear increase of the activation energy when the ionic radii of the Ln3+ cation decreases. La and Nd compounds exhibit similar conductivities, significantly larger than that of the Gd counterpart." @default.
- W2326547462 created "2016-06-24" @default.
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- W2326547462 date "2004-11-12" @default.
- W2326547462 modified "2023-10-18" @default.
- W2326547462 title "Cuspidine-Like Compounds Ln<sub>4</sub>[Ga<sub>2(1</sub><sub>-</sub><i><sub>x</sub></i><sub>)</sub>Ge<sub>2</sub><i><sub>x</sub></i>O<sub>7+</sub><i><sub>x</sub></i>□<sub>1</sub><sub>-</sub><i><sub>x</sub></i>]O<sub>2</sub> (Ln = La, Nd, Gd; <i>x</i> ≤ 0.4)" @default.
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- W2326547462 doi "https://doi.org/10.1021/cm048910t" @default.
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