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2005
Deintercalation
H 2100
Preparation of Superconducting Nax(H2O)yCoO2 Using NaMnO 4 as the Deintercalation and Oxidation Agent. — Title cobalt oxyhydrates with 0.28 ≤ x ≤ 0.43 are
18- 016 synthesized
for the first time by immersing γ-Na0.7CoO2 in aqueous NaMnO 4 solution.
The samples are characterized by powder XRD, susceptibility, and magnetization measurements. The Na content x decreases with increasing concentration of the NaMnO4
solution and depends slightly on the immersion time. The samples exhibit a superconducting transition temperature of about 4.6 K. — (LIU*, C.-J.; HUNG, W.-C.; WANG,
J.-S.; LIU, C.-J. C.; J. Am. Chem. Soc. 127 (2005) 3, 830-831; Dep. Phys., Natl.
Changhua Univ. Educ., Changhua 50058, Taiwan; Eng.) — W. Pewestorf
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