Features of the structure of hydrate forms of iron(III) oxalate
P.Yu. Tyapkin1,2, S.A. Petrov1, A.P. Chernyshev1,3, A.I. Ancharov1,2,4, L.A. Sheludyakova5, N.F. Uvarov1,2,3
1Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Novosibirsk National Research State University, Novosibirsk, 630090 Russia
3Novosibirsk State Technical University, Novosibirsk, 630073 Russia
4Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
5Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: оксалат железа, мессбауэровская спектроскопия, рентгеновская дифракция, синхротронное излучение, ИК спектроскопия, метастабильная аморфная фаза, iron oxalate, MГ¶ssbauer spectroscopy, X-ray diffraction, synchrotron radiation, IR spectroscopy, metastable amorphous phase
Abstract
The existence of hydrate forms of iron(III) oxalate, which noticeably differ from each other in the Mössbauer spectral parameters (isomer shift and quadrupole splitting), is detected. In the assumption of the formation of phases with different structural characteristics the samples of the compound under study are studied by the powder X-ray diffraction analysis (including the application of synchrotron radiation), Mössbauer and IR spectroscopy. It is shown that the phase characterized by new values of the Mössbauer parameters has its own IR spectrum and it is X-ray amorphous and metastable.
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