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Published online by Cambridge University Press: 26 February 2011
The layered niobium oxysulfide was synthesized by the heat treatment of K4Nb6O17 · 3H2O layered oxide in the mixture of H2S/N2 gases. The layered oxysulfide had the large plate-like shape, and the total ratio of compound was estimated KxNbS2-yOy (The number of x was from 0.2 to 0.4, y was from about 0.5 to 1.0). According to the XPS measurement, the oxidation state of Nb was estimated for +2, +4, +5, and oxidation state of S was -2. It was confirmed that the layered oxysulfide has ion exchange, and intercalation capabilities as proton exchange reactions take place in H2SO4 solution and bulky amine molecules can be intercalated in an amine solution.