A comparative study on the thermal decomposition of lanthanide biscitrato chromate(III) hydrates, $Ln$[$Cr(C_6H_5O_7)_2$]$.n${H_2O}$$

Devi, PS and Rao, MS (1997) A comparative study on the thermal decomposition of lanthanide biscitrato chromate(III) hydrates, $Ln$[$Cr(C_6H_5O_7)_2$]$.n${H_2O}$$. In: Journal Of Thermal Analysis, 48 (4). pp. 909-916.

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Abstract

The thermal decomposition of lanthanide biscitrato chromate (III) hydrates, [Ln(Cr(C6H5O7)(2)].nH(2)O where Ln = Pr, Nd, Dy and Ho have been carried out in static air and flowing argon atmospheres and thereby compared the decomposition nature with that of the lanthanum biscitrato chromate(III) dihydrate reported earlier. The precursor complexes decompose in four major steps. Stable oxycarbonates and chromates(V) have been isolated as intermediates. It has been found that for heavier lanthanide complexes all the decomposition steps are pushed to 'higher temperature' ranges. Moreover, the thermal stability range of chromates(V) is much lesser compared to that of LaCrO4. Based on the observed experimental results a general scheme for the decomposition of lanthanide biscitrato chromate(III) hydrates is proposed.

Item Type:	Journal Article
Publication:	Journal Of Thermal Analysis
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	Complexes;lanthanide biscitrato chromate(III) hydrates.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	11 Mar 2009 09:23
Last Modified:	19 Sep 2010 04:59
URI:	http://eprints.iisc.ac.in/id/eprint/18024

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