2021
DOI: 10.1038/s42004-021-00558-3
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Uranium carbonate complexes demonstrate drastic decrease in stability at elevated temperatures

Abstract: Quantitative understanding of uranium transport by high temperature fluids is crucial for confident assessment of its migration in a number of natural and artificially induced contexts, such as hydrothermal uranium ore deposits and nuclear waste stored in geological repositories. An additional recent and atypical context would be the seawater inundated fuel of the Fukushima Daiichi Nuclear Power Plant. Given its wide applicability, understanding uranium transport will be useful regardless of whether nuclear po… Show more

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Cited by 16 publications
(5 citation statements)
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“…Raman spectroscopic measurements were performed using a Horiba LabRAM HR Evolution Raman spectrometer/microscope system of the Radiogeochemistry Team at Los Alamos National Laboratory (LANL). , A 532 nm laser was utilized for the spectroscopic measurements, and an Olympus 20× long-working-distance objective lens was used to visualize the sample and focus the laser into the sample chamber. All spectra were collected in the 100–1400 cm –1 range.…”
Section: Experimental Methodsmentioning
confidence: 99%
“…Raman spectroscopic measurements were performed using a Horiba LabRAM HR Evolution Raman spectrometer/microscope system of the Radiogeochemistry Team at Los Alamos National Laboratory (LANL). , A 532 nm laser was utilized for the spectroscopic measurements, and an Olympus 20× long-working-distance objective lens was used to visualize the sample and focus the laser into the sample chamber. All spectra were collected in the 100–1400 cm –1 range.…”
Section: Experimental Methodsmentioning
confidence: 99%
“…Each spectrum is the result of three accumulations per window with the time of each accumulation being between 30 and 120 s. The total time of counting for each spectrum was approximately 5–20 min, depending on the counting time. Additionally, to verify that no U–O vibrational modes were present at frequencies >300 cm –1 , a set of spectra were collected from 300 to 1000 cm –1 at 298, 473, 672, and 871 K. The above Raman spectroscopic measurement procedures using the same instrument have been described previously. …”
Section: Experimental Methodsmentioning
confidence: 99%
“…Combining XRD mapping techniques with compatible reaction cells, such as a hydrothermal diamond anvil cell (HDAC) has broadened the range of possible in situ studies. Such techniques have been used in numerous studies to provide insights into the structure and behavior of minerals and materials under extreme conditions such as high temperatures (up to 600 °C) and high pressures (up to more than 1 GPa). …”
Section: Introductionmentioning
confidence: 99%