NDLI: Thermolysis mechanism of dysprosium hexahydrate nitrate Dy(NO$_{3}$)$_{3}$·6H$_{2}$O and modeling of intermediate decomposition products

Content Provider	SpringerLink
Author	Melnikov, P. Arkhangelsky, I. V. Nascimento, V. A. Silva, A. F. Oliveira, L. C. S. Zani Consolo, L. Z. Herrero, A. S.
Copyright Year	2015
Abstract	The thermal decomposition of dysprosium nitrate is a complex process which begins with the simultaneous condensation of the initial monomer Dy(NO$_{3}$)$_{3}$·6H$_{2}$O into a cyclic hexamer 6[Dy(NO$_{3}$)$_{3}$·6H$_{2}$O]. This cluster gradually loses water and nitric acid, and intermediate oxynitrates Dy$_{6}$O$_{7}$(NO$_{3}$)$_{4}$·6H$_{2}$O and Dy$_{6}$O$_{8}$(NO$_{3}$)$_{2}$·5H$_{2}$O are formed. At higher temperatures, these products undergo further degradation, lose nitrogen dioxide, water, and oxygen, and finally, after having lost lattice water, are transformed into the cubic form of dysprosium oxide. The models of intermediate oxynitrates represent a reasonably good approximation to the real structures and a proper interpretation of experimental data. The comparison of the potential energies of consecutive oxynitrates permitted an evaluation of their stability. The mechanism was studied by thermal analysis, differential scanning calorimetry, infrared spectroscopy, and X-ray diffraction. The mass losses were related to the vibrational energy levels of the evolved gases.
Starting Page	571
Ending Page	578
Page Count	8
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	122
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-24
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Rare earth Dysprosium nitrate hexahydrate Thermal decomposition Oxynitrates Computer modeling Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Physical and Theoretical Chemistry

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