Published September 2001 | Version v1
Journal article Metadata-only

Coordination of heterovalent iron atoms in SrCo1-yFeyO3-z solid solutions

Creators

  • 1. Inst. Obshchej i Neorganicheskoj Khimii im. N.S. Kurnakova RAN, Moscow (Russian Federation)
  • 2. MGU im. M.V. Lomonosova, Moscow (Russian Federation)

Description

Superfine interactions on 57Fe nuclei of solid solutions featuring composition SrCo1-yFeyO3-z (0.2≤y≤0.8) were studied by the method of the Moessbauer spectroscopy. Spectra of 57Fe measured at 300 K are superposition of two quadrupole doublets, which in terms of their parameters correspond to high-spin Fe4+ cations in anionic surrounding with coordination number 5 (tetragonal pyramid) and Fe3+ cations in a distorted octahedral surrounding. Comparative analysis of electron exchange constants for solid solutions prepared using the method of the Moessbauer spectroscopy and on the basis of thermodynamic calculations was conducted. Correlation between oxygen permittivity in the perovskites and their composition and structure was established

Abstract (Russian)

Методом мессбауэровской спектроскопии исследованы сверхтонкие взаимодействия на ядрах 57Fe твердых растворов состава SrCo1-yFeyO3-z (0,2≤y≤0,8). Спектры 57Fe, измеренные при 300 К, представляют собой суперпозицию двух квадрупольных дублетов, которые по своим параметрам соответствуют высокоспиновым катионам Fe4+ в анионном окружении с координационным числом 5 (тетрагональная пирамида) и катионам Fe3+ в искаженном октаэдрическом окружении. Проведен сравнительный анализ констант электронного обмена твердых растворов, полученных с использованием метода мессбауэровской спектроскопии и на основе термодинамических расчетов. Установлена взаимосвязь проницаемости кислорода в перовскитах с их составом и структурой

Additional details

Additional titles

Original title (Russian)
Координация разновалентных ионов железа в твердых растворах состава SrCo

Publishing Information

Journal Title
Koordinatsionnaya Khimiya
Journal Volume
27
Journal Issue
9
Journal Page Range
p. 672-676
ISSN
0132-344X
CODEN
KOKHDC

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33043112
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CHEMICAL COMPOSITION; COBALT OXIDES; COORDINATION NUMBER; CRYSTAL STRUCTURE; IRON 57; IRON OXIDES; MOESSBAUER EFFECT; SOLID SOLUTIONS; SPECTRA; STRONTIUM OXIDES; STRUCTURAL CHEMICAL ANALYSIS; VALENCE
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COBALT COMPOUNDS; DISPERSIONS; EVEN-ODD NUCLEI; HOMOGENEOUS MIXTURES; INTERMEDIATE MASS NUCLEI; IRON COMPOUNDS; IRON ISOTOPES; ISOTOPES; MIXTURES; NUCLEI; OXIDES; OXYGEN COMPOUNDS; SOLUTIONS; STABLE ISOTOPES; STRONTIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
11 refs.; 2 tabs.; 2 figs.