The thermal decomposition of monohydrated ammonium oxotris (oxalate) niobate

Brazilian Journal of Chemical Engineering

F. F. P. Medeiros²  M. F. V. Moura²  A. G. P Da Silva¹  C. P. Souza²  K. K. P. Gomes²  U. U. Gomes² 

[1] ,Universidade Federal Rio Grande do Norte CCET DFTE2Natal RN ,Brazil

关键词: Thermal decomposition;    Thermal analysis;    Infrared;    Niobium complex;   

DOI  :  10.1590/S0104-66322006000400011

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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