Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate. Physico-chemical studies

Citation
Bs. Randhawa et Kj. Sweety, Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate. Physico-chemical studies, J THERM ANA, 65(3), 2001, pp. 829-835
Citations number
20
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN journal
13886150 → ACNP
Volume
65
Issue
3
Year of publication
2001
Pages
829 - 835
Database
ISI
SICI code
1388-6150(2001)65:3<829:TAOMTF>2.0.ZU;2-7
Abstract
Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate has been studied from ambient to 700 degreesC in static air atmosphere employin g TG, DTG, DTA, XRD, Mossbauer and infrared spectroscopic techniques. The p recursor decomposes to iron(II) intermediate species along with magnesium m aleate at 248 degreesC. The iron(II) species then undergo oxidative decompo sition to give alpha -Fe2O3 at 400 degreesC. At higher temperatures magnesi um maleate decomposes directly to magnesium oxide, MgO, which undergoes a s olid state reaction with alpha -Fe2O3 to yield magnesium ferrite (MgFe2O4) at 600 degreesC, a temperature much lower than for ceramic method. The resu lts have been compared with those of the oxalate precursor.