Thermoanalytical behavior of neodymium nitrate hexahydrate Nd(NO3)3•6H2O

被引：5
|
作者：
Melnikov, P. [1 ]
Arkhangelsky, I. V. [2 ]
Nascimento, V. A. [1 ]
de Oliveira, L. C. S. [1 ]
Wandekoken, G. A. [1 ]
de Albuquerque, D. Muniz [1 ]
机构：
[1] Univ Fed Mato Grosso do Sul, Campo Grande, MS, Brazil
[2] Moscow MV Lomonosov State Univ, Moscow, Russia
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2020年 / 139卷 / 06期
关键词：
Neodymium nitrate; Thermal decomposition; Lanthanides; Thermolysis; THERMAL-DECOMPOSITION MECHANISM; INTERMEDIATE PRODUCTS; THERMOLYSIS MECHANISM;
D O I：
10.1007/s10973-019-08748-x
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The hexahydrate Nd(NO3)(3)center dot 6H(2)O melts in its water of crystallization at 328 K. There are no phase transitions at least above 233 K. Similar to other nitrates in the lanthanide series, its thermal decomposition is a gradual process, which entails the formation of a cluster 6[Nd(NO3)(3)center dot 6H(2)O] after the condensation of 6 mol of the initial monomer. During this process, a multicomponent multiphase system exists far from equilibrium and is continuously maintained in this state until normal neodymium oxide is formed. The main volatile products of thermolysis are water, nitric acid, azeotrope 68% HNO3-32% H2O, nitrogen dioxide and oxygen. The proposed mechanism satisfactorily explains the mass losses in accordance with the experimental results.
引用
收藏
页码：3493 / 3497
页数：5
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