Ivan Pidchenko
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View article: U(V) Stabilization via Aliovalent Incorporation of Ln(III) into Oxo‐salt Framework
U(V) Stabilization via Aliovalent Incorporation of Ln(III) into Oxo‐salt Framework Open
Pentavalent uranium compounds are key components of uranium‘s redox chemistry and play important roles in environmental transport. Despite this, well‐characterized U(V) compounds are scarce primarily because of their instability with respe…
View article: Assessing long-term microbial impact on mineralogical trapping of uranium from deep groundwater at Äspö Hard Rock Laboratory, Sweden
Assessing long-term microbial impact on mineralogical trapping of uranium from deep groundwater at Äspö Hard Rock Laboratory, Sweden Open
<p>Natural uranium (U) in deep groundwater has been extensively studied in connection to the search for suitable locations for final disposal of spent nuclear fuel (SNF).[1] The U removal process depends on environmental and geochemi…
View article: Synthesis, Structural, and Electronic Properties of K<sub>4</sub>Pu<sup>VI</sup>O<sub>2</sub>(CO<sub>3</sub>)<sub>3(cr)</sub>: An Environmentally Relevant Plutonium Carbonate Complex
Synthesis, Structural, and Electronic Properties of K<sub>4</sub>Pu<sup>VI</sup>O<sub>2</sub>(CO<sub>3</sub>)<sub>3(cr)</sub>: An Environmentally Relevant Plutonium Carbonate Complex Open
The chemical properties of actinide materials are often predefined and described based on the data available for isostructural species. This is the case for potassium plutonyl (PuVI) carbonate, K4PuVIO2(CO3)3(cr), a complex relevant for nu…
View article: A multi-technique study of altered granitic rock from the Krunkelbach Valley uranium deposit, Southern Germany
A multi-technique study of altered granitic rock from the Krunkelbach Valley uranium deposit, Southern Germany Open
Herein, a multi-technique study was performed to reveal the elemental speciation and microphase composition in altered granitic rock collected from the Krunkelbach Valley uranium (U) deposit area near an abandoned U mine, Black Forest, Sou…
View article: The missing pieces of the PuO<sub>2</sub>nanoparticle puzzle
The missing pieces of the PuO<sub>2</sub>nanoparticle puzzle Open
We report a full characterization of PuO2nanoparticles at the atomic level and probe their local and electronic structure by a variety of methods available at the synchrotron and theoretical approaches.
View article: Competitive Reaction of Neptunium(V) and Uranium(VI) in Potassium–Sodium Carbonate-Rich Aqueous Media: Speciation Study with a Focus on High-Resolution X-ray Spectroscopy
Competitive Reaction of Neptunium(V) and Uranium(VI) in Potassium–Sodium Carbonate-Rich Aqueous Media: Speciation Study with a Focus on High-Resolution X-ray Spectroscopy Open
Neptunium(V) and uranium(VI) are precipitated from an aqueous potassium-sodium-containing carbonate-rich solution, and the solid phases are investigated. U/Np M4,5-edge high-energy resolution X-ray absorption near edge structure (HR-XANES)…
View article: Rücktitelbild: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles (Angew. Chem. 49/2019)
Rücktitelbild: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles (Angew. Chem. 49/2019) Open
Eine neuartige feste Phase von fünfwertigem Plutonium wurde auf dem Reaktionspfad von wässrigem PuVI zu PuO2-Nanopartikeln beobachtet, wie K. O. Kvashnina et al. in ihrer Zuschrift auf S. 17722 berichten. Erreicht wurde dies durch die Komb…
View article: Back Cover: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles (Angew. Chem. Int. Ed. 49/2019)
Back Cover: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles (Angew. Chem. Int. Ed. 49/2019) Open
A novel pentavalent plutonium solid phase was observed on the pathway from aqueous PuVI to PuO2 nanoparticles, as reported by K. O. Kvashnina et al. in their Communication on page 17558 ff. This was achieved by combining a high-energy-reso…
View article: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles
A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles Open
Here we provide evidence that the formation of PuO 2 nanoparticles from oxidized Pu VI under alkaline conditions proceeds through the formation of an intermediate Pu V solid phase, similar to NH 4 PuO 2 CO 3 , which is stable over a period…
View article: A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles
A Novel Metastable Pentavalent Plutonium Solid Phase on the Pathway from Aqueous Plutonium(VI) to PuO<sub>2</sub> Nanoparticles Open
Here we provide evidence that the formation of PuO 2 nanoparticles from oxidized Pu VI under alkaline conditions proceeds through the formation of an intermediate Pu V solid phase, similar to NH 4 PuO 2 CO 3 , which is stable over a period…
View article: CCDC 1883757: Experimental Crystal Structure Determination
CCDC 1883757: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case
Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case Open
For more than 120 years, systematic studies of X-ray interaction with matter have been the basis for our understanding of materials—both of natural or man-made origin—and their structure-function relationships. Beginning with simple radiog…
View article: Differential uranyl(<scp>v</scp>) oxo-group bonding between the uranium and metal cations from groups 1, 2, 4, and 12; a high energy resolution X-ray absorption, computational, and synthetic study
Differential uranyl(<span>v</span>) oxo-group bonding between the uranium and metal cations from groups 1, 2, 4, and 12; a high energy resolution X-ray absorption, computational, and synthetic study Open
Uranyl Pacman takes them all: the bonding of s- and d-block cations to uranyl is compared by experiment, spectroscopy and theory.
View article: Uranium Redox Transformations after U(VI) Coprecipitation with Magnetite Nanoparticles
Uranium Redox Transformations after U(VI) Coprecipitation with Magnetite Nanoparticles Open
Uranium redox states and speciation in magnetite nanoparticles coprecipitated with U(VI) for uranium loadings varying from 1000 to 10 000 ppm are investigated by X-ray absorption spectroscopy (XAS). It is demonstrated that the U M4 high en…