Stability of Solid Uranyl Peroxides under Irradiation
[3];
[4]
- Univ. of Notre Dame, IN (United States). Radiation Lab.
- Univ. of Notre Dame, IN (United States). Dept. of Civil and Environmental Engineering and Earth Sciences
- Univ. of Notre Dame, IN (United States). Dept. of Civil and Environmental Engineering and Earth Sciences, and Dept. of Chemistry and Biochemistry
- Univ. of Notre Dame, IN (United States). Radiation Lab., and Dept. of Physics
The effects of radiation on a variety of uranyl peroxide compounds were examined using γ-rays and 5 MeV He ions, the latter to simulate α-particles. The studied materials were studtite, [(UO2)(O2)(H2O)2](H2O)2, the salt of the U60 uranyl peroxide cage cluster, Li44K16[(UO2)(O2)(OH)]60·255H2O, the salt of U60Ox30 uranyl peroxide oxalate cage cluster, Li12K48[{(UO2)(O2)}60(C2O4)30]·$$n$$H2O, and the salt of the U24Pp12 (Pp = pyrophosphate) uranyl peroxide pyrophosphate cage cluster, Li24Na24[(UO2)24(O2)24(P2O7)12]·120H2O. Irradiated powders were characterized using powder X-ray diffraction, Raman spectroscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, and UV–vis spectroscopy. A weakening of the uranyl bonds of U60 was found while studtite, U60Ox30, and U24Pp12 were relatively stable to $$γ$$-irradiation. Studtite and U60 are the most affected by α-irradiation forming an amorphous uranyl peroxide as characterized by Raman spectroscopy and powder X-ray diffraction while U60Ox30 and U24Pp12 show minor signs of the formation of an amorphous uranyl peroxide.
- Research Organization:
- Univ. of Notre Dame, IN (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0003763
- OSTI ID:
- 1567845
- Journal Information:
- Inorganic Chemistry, Vol. none, Issue none; ISSN 0020-1669
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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