Formation of a uranyl hydroxide hydrateviahydration of [(UO2F2)(H2O)]7·4H2O

Autor: Marie C. Kirkegaard, Jennifer L. Niedziela, Michael W. Ambrogio, Andrew Miskowiec, Tyler L. Spano, Brian B. Anderson, Ashley E. Shields

Publikováno v: Dalton Transactions. 48:13685-13698

Hydrated uranyl fluoride, [(UO2F2)(H2O)]7·4H2O, is not stable at elevated water vapor pressure, undergoing a complete loss of fluorine to form a uranyl hydroxide hydrate. Powder X-ray diffraction data of the resultant uranyl hydroxide species is pre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46782f20a345341048c843a30a03e0ed
https://doi.org/10.1039/c9dt02835h

Characterization of Uranyl Coordinated by Equatorial Oxygen: Oxo in UO3 versus Oxyl in UO3+

Autor: John K. Gibson, Jiwen Jian, Rémi Maurice, Jonathan Martens, Giel Berden, Jos Oomens, Amanda R. Bubas, Michael J. Van Stipdonk, Eric Renault, Irena Tatosian

Publikováno v: The Journal of Physical Chemistry A, 125, 5544-5555
The Journal of Physical Chemistry A, 125, 25, pp. 5544-5555
Journal of Physical Chemistry A
Journal of Physical Chemistry A, American Chemical Society, 2021, 125 (25), pp.5544-5555. ⟨10.1021/acs.jpca.1c03818⟩
Journal of Physical Chemistry A, 125(25), 5544-5555. American Chemical Society
The journal of physical chemistry. A, vol 125, iss 25

Uranium trioxide, UO3, has a T-shaped structure with bent uranyl, UO22+, coordinated by an equatorial oxo, O2-. The structure of cation UO3+ is similar but with an equatorial oxyl, O center dot-. Neutral and cationic uranium trioxide coordinated by n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0114749cb118a1cf7823b04c6120ce3f
http://hdl.handle.net/2066/235599

Efficient Removal of UO22+ from Water Using Carboxycellulose Nanofibers Prepared by the Nitro-Oxidation Method

Autor: Benjamin S. Hsiao, Aurnov Chattopadhyay, Sunil K. Sharma, Priyanka R. Sharma

Publikováno v: Industrial & Engineering Chemistry Research. 56:13885-13893

Carboxycellulose nanofibers (NOCNF) were extracted from untreated jute fibers using a simple nitro-oxidation method, employing nitric acid and sodium nitrite. The resulting NOCNF possessed high surface charge (−70 mV) and large carboxylate content

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::009c3e7c098b00774a7561c2524e4fe4
https://doi.org/10.1021/acs.iecr.7b03659

Elucidation of the Structure and Vibrational Spectroscopy of Synthetic Metaschoepite and Its Dehydration Product

Autor: Jennifer L. Niedziela, Brian B. Anderson, Marie C. Kirkegaard, Ashley E. Shields, Andrew Miskowiec

Publikováno v: Inorganic chemistry. 58(11)

We confirm that synthetic uranyl hydroxide hydrate metaschoepite [(UO)24O(OH)6]·5H2O is unstable against dehydration under dry conditions, and we present a structural and vibrational spectroscopic study of synthetic metaschoepite and its ambient tem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40680eb701202c09b88ae3a9a7dcc0f1
https://pubmed.ncbi.nlm.nih.gov/31099558

Study of the chemical changes of μm-sized particles of uranium tetrafluoride (UF4) in environmental conditions by means of micro-Raman spectrometry

Autor: Fabien Pointurier, Olivier Marie, Colas Lelong

Publikováno v: Vibrational Spectroscopy
Vibrational Spectroscopy, Elsevier, 2020, 110, pp.103145-. ⟨10.1016/j.vibspec.2020.103145⟩
Vibrational Spectroscopy, 2020, 110, pp.103145. ⟨10.1016/j.vibspec.2020.103145⟩

International audience; The purpose of this work is to determine how long UF$_4$ in micro-particles can be detected after release in the environment, what the degradation products are and what are the parameters which mostly lead to degradation of UF

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e7fc192fa03fce8637336ae8167c3dd
https://doi.org/10.1016/j.vibspec.2020.103145