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- W2073203477 abstract "The optical absorption spectrum of Ni doped Na2Zn(SO4)2 · 4 H2O shows that nickel enters the lattice in its divalent state. ESR spectra of X-irradiated sample show two doublets corresponding to the two sites of the unit cell. The spectra are fitted to a spin-Hamiltonian of orthorhombic symmetry and the doublet structure is found to be due to a superhyperfine interaction with a proton. A correlation of the ESR results and observed changes in optical absorption spectra after irradiation indicates the formation of Ni3+. Possible mechanisms responsible for the observed proton hyperfine interaction are discussed. Das optische Absorptionsspektrum von Ni-dotiertem Na2Zn(SO4)2 · 4H2O zeigt, daß Nickel im zweiwertigen Zustand in das Gitter eingebaut wird. ESR-Spektren von Röntgen-bestrahlten Proben ergeben zwei Dubletts entsprechend den beiden Plätzen in der Einheitszelle. Die Spektren lassen sich an einen Spin-Hamiltonoperator rhombischer Symmetrie anpassen, und es wird gefunden, daß die Dublettstruktur durch Superhyperfeinwechselwirkung mit einem Proton hervorgerufen wird. Eine Korrelation der ESR-Ergebnisse mit den beobachteten Änderungen der optischen Absorptionsspektren nach der Bestrahlung ergibt die Bildung von Ni3+. Mögliche Mechanismen für die beobachtete Protonen-Hyperfeinwechselwirkung werden diskutiert." @default.
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- W2073203477 date "1978-06-16" @default.
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- W2073203477 title "Optical absorption and ESR studies of nickel ions in sodium zinc sulphate tetrahydrate" @default.
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- W2073203477 doi "https://doi.org/10.1002/pssa.2210470247" @default.
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