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2005
Cobalt
I 7200
08- 021
A New Series of Sodium Cobalt Oxyhydrates. — β-Na0.6CoO2 is synthesized by solid state reaction of Na2CO3 and CoCO3 under flowing O2 (610 °C, 3 d) and characterized by XRD and its reactivity against bromine. Magnetic susceptibility measurements
show no evidence of bulk superconductivity in any of the hydrated β-phases, but a large
temperature independent contribution implying bulk metallic properties in the majority
phase. The absence of superconductivity emphasises the importance of the CoO2 stacking arrangement for the resultant electronic properties. — (MISTRY, S.; ARNOLD, D.
C.; NUTTALL, C. J.; LAPPAS, A.; GREEN, M. A.; Chem. Commun. (Cambridge)
2004, 21, 2440-2441; R. Inst. GB, London W1S 4BS, UK; Eng.) — W. Pewestorf
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