Title: Synthesis, characterization, and stability of Americium Phosphate, AmPO4
Authors: POPA KARINVIGIER JEAN-FRANCOISMARTEL LAURAMANARA DARIOCOLLE JEAN-YVESDIESTE BLANCO OLIVERWISS THIERRYFREIS DANIELKONINGS RUDY
Citation: INORGANIC CHEMISTRY vol. 59 no. 9 p. 6595-6602
Publisher: AMER CHEMICAL SOC
Publication Year: 2020
JRC N°: JRC119876
ISSN: 0020-1669 (online)
URI: https://publications.jrc.ec.europa.eu/repository/handle/JRC119876
DOI: 10.1021/acs.inorgchem.0c00697
Type: Articles in periodicals and books
Abstract: AmPO4 was prepared by a solid-state reaction method, and its crystal structure at room temperature was solved by powder X-ray diffraction combined with Rietveld refinement. The purity of the monazite-like phase was confirmed by spectroscopic (high-resolution solid-state 31P NMR and Raman) and microscopic (SEM-EDX and TEM) techniques. The thermal and self-irradiation stability have been studied. The compound is stable under argon and air atmosphere at least up to 1773 K. It remains crystalline under self-irradiation for circa two months, with a crystallographic volume swelling of ∼1.5%, and then is amorphizing over a year. However, microcrystals are present in the amorphous material even after a two year period of time. All these characteristics are discussed in relation to the potential application of AmPO4 as a stable form of Am in radioisotope power sources for space exploration and of behavior of the monazites under irradiation.
JRC Directorate:Nuclear Safety and Security

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