Author： Kim S. J. Demazeau G. Presniakov I. Alonso J. A.
Publisher： Taylor & Francis Ltd
ISSN： 0895-7959
Source： International Journal of High Pressure Research, Vol.22, Iss.3, 2002-01, pp. : 555-557
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Abstract
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+α +Fe3−α. This result supports the existence of two different crystallographic sites for Ni in the distorted perovskite lattice.
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