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Article Dans Une Revue High Pressure Research Année : 2002

High oxygen pressures and the improvement of the Mn+ -- O chemical bond through the stabilization of the highest oxidation states (n+)

Résumé

An evolution of local structure of Ni and chemical bonding, Ni(III)-O in perovskite lattice with strongly distorted structure is investigated with 57Fe Mössbauer spectroscopy. The Mössbauer spectra for 57Fe-doped TlNiO3 were resolved to two quadrupole doublets with different isomer shifts, which underlines a partial charge disproportionation phenomenon: 2Fe3+ -> Fe3+alpha +Fe3-alpha. This result supports the existence of two different crystallographic sites for Ni in the distorted perovskite lattice.
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Dates et versions

hal-00715271 , version 1 (07-07-2023)

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Seung-Joo Kim, Gérard Demazeau, Igor A. Presniakov, José A. Alonso. High oxygen pressures and the improvement of the Mn+ -- O chemical bond through the stabilization of the highest oxidation states (n+). High Pressure Research, 2002, 22 (3-4), pp.555-557. ⟨10.1080/08957950212427⟩. ⟨hal-00715271⟩

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