| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Wright, Adrian
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2011Biocompatibility of magnesium phosphate minerals and their stability under physiological conditionscitations
- 2011Structure and magnetic properties of the cubic oxide fluoride BaFeO2Fcitations
- 2009Influence of cooling rate on the structure and composition of NaxCoO2 (x similar to 0.65)citations
- 2009Fluorination of perovskite-related phases of composition SrFe1-xSnxO3-deltacitations
- 2006Crystal structure and magnetic properties of Ca₂MnAlO₅.₅, an n=3 brownmillerite phasecitations
- 2004Crystallographic and magnetic structures of Y₀.₈Sr₂.₂Mn₂GaO₈-ɗ : a new vacancy-ordered perovskite structurecitations
- 2003Synthesis and Characterisation of the Reduced Double-Layer Manganite Sr₃Mn₂O₆₊xcitations
- 2002Structures & Magnetic Ordering in the BrownMillerite Phases, Sr₂MnGaO₅ and Ca₂MnALO₅citations
- 2002Synthesis and characterisation of reduced single layer manganite Sr₂MnO₃.₅₊xcitations
- 2001Synthesis and structure of Sr₂MnGaO₅, a new layered manganese oxidecitations
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article
Influence of cooling rate on the structure and composition of NaxCoO2 (x similar to 0.65)
Abstract
The influence of cooling rate on the composition, structure and magnetic behaviour of NaxCoO2 (x similar to 0.65) is reported. Slow cooled and quenched samples are shown to have different compositions: x = 0.63 and x = 0.68, respectively. On slow cooling, exsolution of sodium occurs and appears as a separate phase, Na2CO3. Whereas the slow-cooled sample has the expected hexagonal symmetry, P6(3)/mmc, a distortion to orthorhombic symmetry (Cmcm, a = 2.83333(4) angstrom, b 4.92297(7) angstrom, c = 10.8948(2) angstrom) is observed for the quenched material. High resolution neutron powder diffraction reveals displacement of sodium ions from their ideal positions for both materials. The different structure and composition are reflected in the Raman spectra and magnetic behaviour of the phases.