STRUCTURAL CHEMISTRY OF PROMETHIUM
A method using promethium-147 was employed to investigate the structural behavior of promethium sesquioxide. Measurements of radioactivity were carried out systematically over a large range of temperatures to determine the distribution of promethium sesquioxide between two nonsoluble solid phases: one with a fluorite lattice and the other with a hexagonal structure. These phases were solid solutions of cerium, praseodymium and thorium dioxides saturated with sesquioxides, and sesquioxides in the hexagonal form saturated with dioxides, respectively. The two solid phases were separated by dissolving the hexagonal phase only with suitable solvents. The investigation indicates that over a large range of temperatures promethium sesquioxide has nearly fluoritic structure. (J.H.M.)
- Research Organization:
- National Research Council, Padua
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-008779
- OSTI ID:
- 4280164
- Journal Information:
- Nature, Journal Name: Nature Vol. Vol: 183
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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