Numéro |
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
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Page(s) | C1-363 - C1-364 | |
DOI | https://doi.org/10.1051/jp4:19971148 |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-363-C1-364
DOI: 10.1051/jp4:19971148
1 Institut de Chimie de la Matière Condensée de Bordeaux, avenue du Dr. A. Schweitzer, 33608 Pessac cedex, France
2 Chaire de Radiochimie, Faculté de Chimie, Université Lomonosov, 119889 Moscou V-234, Russia
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-363-C1-364
DOI: 10.1051/jp4:19971148
Fe(IV) Disproportionation in AFeO3 (A = Ca, Sr) Perovskite Lattices Studied by 119Sn Diamagnetic Probe Mössbauer Spectroscopy
L. Fournès1, G. Demazeau1, S. Darracq1, J. Etourneau1, P. Fabritchnyi2, I.A. Presniakov2, K.V. Pokholok2 and V.P. Gorkov21 Institut de Chimie de la Matière Condensée de Bordeaux, avenue du Dr. A. Schweitzer, 33608 Pessac cedex, France
2 Chaire de Radiochimie, Faculté de Chimie, Université Lomonosov, 119889 Moscou V-234, Russia
Abstract
Fa(IV) is an interesting unusual oxidation state of iron stabilized under oxygen pressure. In a perovskite lattice such an oxidation state disporportionates into Fe(III) and Fe(V). The study of this phenomenon is important for a better knowledge of instable valencies. Using 119Sn(IV) as diamagnetic probe in the perovskite lattice of AFeO3 (A=Ca,Sr) the disproportionation 2Fe(IV)=Fe(III) +Fe(V) is discussed versus local steric and electrostatic interactions.
© EDP Sciences 1997