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- Author or Editor: D. Chhabra x
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Abstract
The thermolysis of sodium hexa/benzoato/ferrate/III/, i. e. Na3[Fe/C6H5COO/6].4.5H2O has been investigated at different temperatures in air using Mössbauer, infrared spectroscopic and derivatographic techniques /DTG, DTA, TG/. The thermal decomposition proceeds without the reduction of iron/III/. An increase in particle size of 
-Fe2O3 formed during thermolysis has been observed with increasing temperature. The end product, -NaFeO2 is formed as a result of the solid state reaction between -Fe2O3 and sodium carbonate.
Abstract
Mössbauer spectra of a series of the complexes of the type Na3[Fe/RCOO/6]xH2O /R=H, CH3, C2H5, C6H5/ has been recorded at 298±2 K. All display a quadrupole doublet with isomer shift and quadrupole splitting values in agreement with high spin iron/III/ octahedral geometry. The quadrupole splitting show an increasing trend with increasing polarizability of the substituent anion /RCOO–/. A linear correlation between quadrupole splitting values and the /Fe–O/ stretching frequencies has also been observed.
Abstract
The thermal decomposition of sodium hexa-carboxylato/ferrates/III/ i.e. Na3[Fe/RCOO/6].xH2O /R=H, CH3, C2H5/ has been studied at various temperatures in air employing Mössbauer and infrared spectroscopies and non-isothermal techniques /DTG, DTA, TG/. The thermolysis proceeds without undergoing the formation of any iron/II/ intermediate. The particle size of α-Fe2O3 formed during thermolysis shows an increasing trend with increasing decomposition temperature. At higher temperatures α-NaFeO2 is formed as the ultimate product for all the complexes.
