Experimental thermochemistry of neptunium oxides: Np2O5 and NpO2
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Nuclear Materials"
DOI: 10.1016/j.jnucmat.2017.10.034
Abstract: Abstract Neptunium (Np) compounds are important in the nuclear fuel cycle because of the buildup and long half-life (2.14 Ma) of Np-237 in nuclear waste, especially during long-term disposal in a geological repository. Neptunium in… read more here.
Keywords: experimental thermochemistry; transuranium compounds; neptunium oxides; np2o5 npo2 ... See more keywords
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.
Sign Up to like & getrecommendations! Published in 2019 at "Inorganic chemistry"
DOI: 10.1021/acs.inorgchem.9b02463
Abstract: 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) spectroscopy and Np 3d4f resonant inelastic X-ray scattering… read more here.
Keywords: neptunium uranium; ray; spectroscopy; neptunium ... See more keywords
Developing Waste Forms for Transuranic Elements: Quaternary Neptunium Fluorides of the Type NaxMNp6F30 (M = Ti, V, Cr, Mn, Fe, Co, Ni, Al, Ga).
Sign Up to like & getrecommendations! Published in 2022 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.2c10669
Abstract: A series of quaternary Np(IV) fluorides was synthesized using a mild hydrothermal synthesis approach. The compositions are all of the type NaxMNp6F30, where M = Ti(III), V(III), Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Al(III), and Ga(III)… read more here.
Keywords: developing waste; waste forms; iii; iii iii ... See more keywords
Electron transfer between neptunium and sodium chlorite in acidic chloride media
Sign Up to like & getrecommendations! Published in 2024 at "New Journal of Chemistry"
DOI: 10.1039/d3nj03730d
Abstract: Redox chemistry between Np4+(aq) and NaClO2(aq) can be controlled as a function of neptunium vs. NaClO2(aq), Cl1−(aq), and H1+(aq) concentrations. Certain chemical environments held Np4+(aq) in the +4 oxidation state. Other chemical environments generated NpO21+(aq)… read more here.
Keywords: neptunium sodium; chemistry; sodium chlorite; neptunium ... See more keywords