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- W2034746695 abstract "Abstract We report the results of 151Eu Mossbauer and optical reflectivity measurements on intercalation compounds formed either by the reaction of graphite with EuCl3, or with EuCl3: AlCl3 mixtures, in the presence of Cl2. Results on graphite flakes and highly-oriented-pyrolytic graphite (HOPG) indicate the presence of a single narrow Mossbauer line characteristic of Eu3+, which we identify with intercalated EuCl3. No evidence for Eu2+ was found in the Mossbauer spectra. Since Eu3+ is the most easily reduced of the rare earth ions, we conclude that no reduction of any rare earth trichlorides takes place under similar conditions of intercalation. The optical reflectance spectrum of the HOPGEuCl3Cl2 exhibits a sharp Drude edge at ∼ 1.2 eV consistent with metallic conduction and a moderate charge transfer. These results taken collectively suggest that the enhanced metallic conductivity in rare earth chloride intercalation compounds is associated with charge transfer from the graphite to the co-intercalated Cl2 forming Cl- and is consistent with measured stoichiometries CnEuCl3+δ, where δ≅0.2." @default.
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- W2034746695 date "1984-11-01" @default.
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- W2034746695 title "Charge transfer in rare earth-trichloride graphite intercalation compounds" @default.
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- W2034746695 doi "https://doi.org/10.1016/0038-1098(84)90732-4" @default.
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