The luminescence of uranium-activated tungstates and molybdates with scheelite structure
- 1 February 1980
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 72 (3) , 1803-1808
- https://doi.org/10.1063/1.439297
Abstract
The luminescence properties of scheelites with composition AWO4–U and AMoO4–U (A=Ca, Sr, or Ba) are reported. The red luminescence is due to a tetrahedral UO2−4 group. There is a strong vibronic coupling with low‐frequency vibrational modes. Further the frequency of the symmetric and asymmetric stretching vibrations of the UO2−4 tetrahedron have been determined. The dramatic variation of the luminescence quenching temperature with the nature of the A ion is related to the position and the width of higher excited charge‐transfer transitions. The radiant decay times are rather short (10–20 μs). Their temperature dependence shows that at least four energy levels are involved in the radiative emission processes. The green luminescence can be ascribed to the presence of a second phase of composition AUO4.Keywords
This publication has 17 references indexed in Scilit:
- Transition rates in single-ħω modelsJournal of Luminescence, 1979
- The luminescence of hexavalent uranium in solidsJournal of Luminescence, 1979
- The nature of the electronic transitions of the vanadate groupJournal of Inorganic and Nuclear Chemistry, 1978
- The Structure Sensitivity of the U6+ Ion Luminescence in OxidesJournal of the Electrochemical Society, 1977
- Luminescence of the octahedral uranate groupJournal of Luminescence, 1976
- Luminescence of the octahedral uranate groupJournal of Luminescence, 1976
- Vibrational spectra of HgMoO4 and HgWO4Journal of Inorganic and Nuclear Chemistry, 1975
- Low-temperature photoluminescence of strontium and barium tungstatePhysica Status Solidi (a), 1974
- Fluorescent Properties of Some Europium-Activated PhosphorsJournal of the Electrochemical Society, 1964
- Lumineszenzuntersuchungen an Uran-aktivierten Erdalkaliwolframaten und -molybdatenThe European Physical Journal A, 1955