Paper Title:
Preparation and Properties of Lanthanide Phosphates
  Abstract

Lanthanide phosphates are known as slightly soluble salts with their solubility products ranging from 10-25 to 10-27. These phosphates can be obtained a) by precipitation from aqueous solutions of their salts using, for example, sodium or ammonium phosphates or b) by crystallization from boiling phosphoric acid solution. Application of crystallization in highly acidic solution instead of precipitation method yields highly crystalline solids of the composition of LnPO4.H2O (Ln: La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu and Y). This paper presents the effect of the acidity of the solution used for the crystallization process on crystallinity and morphology of EuPO4.H2O obtained: the higher the acidity of the solution the larger the crystals obtained. The morphology of the crystals changed from sphere-like particles crystallized in 2M H3PO4 to large hexagonal rods formed 2M H3PO4 with additional 0.4 M of HCl or HNO3.

  Info
Periodical
Key Engineering Materials (Volumes 284-286)
Main Theme
Edited by
Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.
Pages
79-82
DOI
10.4028/www.scientific.net/KEM.284-286.79
Citation
R. Kijkowska, R. Z. LeGeros, "Preparation and Properties of Lanthanide Phosphates", Key Engineering Materials, Vols. 284-286, pp. 79-82, 2005
Online since
April 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Emil Tymicki, Krzysztof Grasza, Katarzyna Racka, Marcin Raczkiewicz, Tadeusz Łukasiewicz, Maciej Gała, Kinga Kościewicz, Ryszard Diduszko, Rafał Bożek
Abstract:4H-SiC single crystals grown by the seeded physical vapour transport method have been investigated. These crystals were grown on 6H-SiC...
15
Authors: Shu Jiang Liu, Yan Fei Zhang
Abstract:Transparent phosphosilicate glass-ceramics were prepared by heating the spontaneously crystallized precursor glasses in which crystals have...
1096
Authors: Kai Huang, Li Ping Qiu, Jin Feng Meng, Dong Wang
Chapter 5: Environmental Restoration Engineering, Treatment and Removal Technologies and Processes
Abstract:By- products are widespread in the crystallization of magnesium ammonia phosphate (MAP) as the differences in reactive conditions which...
1289
Authors: Zhao Hua Yin, Yong Chen, Zhong Wei Wang, Ying Xing, Xiu Juan Tian, Qing Yu, Chang Gong Meng
Chapter 4: Biomaterials and Chemical Materials
Abstract:ZSM-5 zeolite was synthesized via a template-free method. The influence of crystallization time was investigated. The obtained samples were...
176
Authors: Andrius Laurikėnas, Jurgis Barkauskas, Aivaras Kareiva
Chapter 2: Inorganic Luminescent Materials and Materials for Optoelectronics and Photovoltaics
Abstract:In this study, lanthanide elements (Ln3+) and 2,3,5,6-tetrafluoro-1,4-benzenedicarboxylic acid (TFBDC) based metal-organic...
70