The thermal decomposition of monohydrated ammonium oxotris (oxalate) niobate

The thermal decomposition in argon of the monohydrated ammonium tris(oxalate)niobate, (NH4)3NbO(C2O4)3.H 2O, has been studied by TG/DTG, DTA, DSC, IR absorption and XRD. The material decomposes stepwise by the release of CO, CO2, NH3 and water. The atomic structure of the complex initially becomes a...

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Bibliographic Details
Published in:Brazilian journal of chemical engineering 2006-12, Vol.23 (4), p.531-538
Main Authors: Medeiros, F. F. P., Moura, M. F. V., Silva, A. G. P da, Souza, C. P., Gomes, K. K. P., Gomes, U. U.
Format: Article
Language:English
Subjects:
ENGINEERING, CHEMICAL
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Summary:The thermal decomposition in argon of the monohydrated ammonium tris(oxalate)niobate, (NH4)3NbO(C2O4)3.H 2O, has been studied by TG/DTG, DTA, DSC, IR absorption and XRD. The material decomposes stepwise by the release of CO, CO2, NH3 and water. The atomic structure of the complex initially becomes amorphous and then crystallizes twice in the form of orthorhombic and monoclinic niobium pentoxide.
ISSN:0104-6632
1678-4383
0104-6632
DOI:10.1590/S0104-66322006000400011