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Journal Article

Synthesis and characterisation of Na5[CoO2]CO3

MPS-Authors
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Sofin,  M.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Peters,  E.-M.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280091

Jansen,  M.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Sofin, M., Peters, E.-M., & Jansen, M. (2002). Synthesis and characterisation of Na5[CoO2]CO3. Zeitschrift für Naturforschung B, 57(12), 1461-1463.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EEC5-8
Abstract
Na-5[CoO2]CO3 was prepared via the azide/nitrate route.
Stoichiometric mixtures of the precursors (Co3O4, NaN3, NaNO3
and Na2CO3) were heated in a special regime up to 500 degreesC
and annealed at this temperature for 50 h in silver crucibles.
Single crystals have been grown by subsequent annealing of the
powder at 500 degreesC for 2000 h in silver crucibles, which
were sealed in glass ampoules under dry Ar. According to the X-
ray analysis of the crystal structure (P4/mmm, Z = 1, a =
4.6467(4), c = 8.2577(6) Angstrom). Na-5[CoO2]CO3 is
isostructural with Na-5[NiO2]CO3 and contains Co1+, which is
coordinated by two oxygen atoms forming a dumb-bell. Na5CoCO5
decomposes at 600 degreesC to Na3CoO2 and Na2CO3.