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Did you mean cofinite【矿】 (3 results)?
Ceramic Mineral Waste-Forms for Nuclear Waste Immobilization.
Orlova AI, Ojovan MI. Orlova AI, et al. Materials (Basel). 2019 Aug 19;12(16):2638. doi: 10.3390/ma12162638. Materials (Basel). 2019. PMID: 31430956 Free PMC article. Review.
We have considered inorganic materials characterized by different structures, including simple oxides with fluorite structure, complex oxides (pyrochlore, murataite, zirconolite, perovskite, hollandite, garnet, crichtonite, freudenbergite, and P-pollucite), simple silicates (zirc …
We have considered inorganic materials characterized by different structures, including simple oxides with fluorite structure, complex oxide …
Coffinite formation from UO(2+x).
Szenknect S, Alby D, López García M, Wang C, Podor R, Miserque F, Mesbah A, Duro L, Zetterström Evins L, Dacheux N, Bruno J, Ewing RC. Szenknect S, et al. Sci Rep. 2020 Jul 22;10(1):12168. doi: 10.1038/s41598-020-69161-1. Sci Rep. 2020. PMID: 32699386 Free PMC article.
There is ample evidence from nature that many uranium deposits have experienced conditions for which the formation of coffinite, USiO(4), has been favoured over uraninite, UO(2+x), during subsequent alteration events. Thus, coffinite is an important alteration produ …
There is ample evidence from nature that many uranium deposits have experienced conditions for which the formation of coffinite, USiO …
Potential aquifer vulnerability in regions down-gradient from uranium in situ recovery (ISR) sites.
Saunders JA, Pivetz BE, Voorhies N, Wilkin RT. Saunders JA, et al. J Environ Manage. 2016 Dec 1;183:67-83. doi: 10.1016/j.jenvman.2016.08.049. Epub 2016 Aug 27. J Environ Manage. 2016. PMID: 27576149 Free PMC article. Review.
Groundwater redox geochemistry, aqueous complexation, and solute migration are important in leaching uranium from source rocks and transporting it in low concentrations to a chemical redox interface where it is deposited in an ore zone typically containing the uranium minerals ur …
Groundwater redox geochemistry, aqueous complexation, and solute migration are important in leaching uranium from source rocks and transport …
Uranium Concentrations in Private Wells of Potable Groundwater, Korea.
Lee WC, Lee SW, Jeon JH, Lee JH, Jeong DH, Kim MS, Kim HK, Kim SO. Lee WC, et al. Toxics. 2022 Sep 18;10(9):543. doi: 10.3390/toxics10090543. Toxics. 2022. PMID: 36136508 Free PMC article.
A more detailed investigation of the relationship between U concentration and geology revealed that the Jurassic porphyritic granite, mainly composed of Daebo granite, showed the highest U contents, which indicated that U might originate from uraninite (UO(2)) and coffinite …
A more detailed investigation of the relationship between U concentration and geology revealed that the Jurassic porphyritic granite, mainly …
Diagenetic formation of uranium-silica polymers in lake sediments over 3,300 years.
Lefebvre P, Gourgiotis A, Mangeret A, Sabatier P, Le Pape P, Diez O, Louvat P, Menguy N, Merrot P, Baya C, Zebracki M, Blanchart P, Malet E, Jézéquel D, Reyss JL, Bargar JR, Gaillardet J, Cazala C, Morin G. Lefebvre P, et al. Proc Natl Acad Sci U S A. 2021 Jan 26;118(4):e2021844118. doi: 10.1073/pnas.2021844118. Proc Natl Acad Sci U S A. 2021. PMID: 33479173 Free PMC article.
We demonstrate that, after sediment deposition, mononuclear U(IV) species associated with organic matter transformed into authigenic polymeric U(IV)-silica species that might have partially converted to a nanocrystalline coffinite (U(IV)SiO(4).nH(2)O)-like phase. This diag …
We demonstrate that, after sediment deposition, mononuclear U(IV) species associated with organic matter transformed into authigenic polymer …
Thermodynamics of formation of coffinite, USiO4.
Guo X, Szenknect S, Mesbah A, Labs S, Clavier N, Poinssot C, Ushakov SV, Curtius H, Bosbach D, Ewing RC, Burns PC, Dacheux N, Navrotsky A. Guo X, et al. Proc Natl Acad Sci U S A. 2015 May 26;112(21):6551-5. doi: 10.1073/pnas.1507441112. Epub 2015 May 11. Proc Natl Acad Sci U S A. 2015. PMID: 25964321 Free PMC article.
Coffinite, USiO4, is an important U(IV) mineral, but its thermodynamic properties are not well-constrained. In this work, two different coffinite samples were synthesized under hydrothermal conditions and purified from a mixture of products. ...
Coffinite, USiO4, is an important U(IV) mineral, but its thermodynamic properties are not well-constrained. In this work, two differe …
Raman mapping of coal halos induced by uranium mineral radiation.
Machovič V, Havelcová M, Sýkorová I, Borecká L, Lapčák L, Mizera J, Kříbek B, Krist P. Machovič V, et al. Spectrochim Acta A Mol Biomol Spectrosc. 2021 Feb 5;246:118996. doi: 10.1016/j.saa.2020.118996. Epub 2020 Sep 25. Spectrochim Acta A Mol Biomol Spectrosc. 2021. PMID: 33032112
Raman mapping microspectroscopy was used as an advantageous high spatial resolution method for detailed assessment of the structure of radiation-induced halos in bituminous coal (Upper Paleozoic) with numerous inclusions of uraninite and coffinite. The uranium content in i …
Raman mapping microspectroscopy was used as an advantageous high spatial resolution method for detailed assessment of the structure of radia …
Instability of U3Si2 in pressurized water media at elevated temperatures.
Migdisov A, Nisbet H, Li N, White J, Xu H, Nelson A, Roback R. Migdisov A, et al. Commun Chem. 2021 May 13;4(1):65. doi: 10.1038/s42004-021-00504-3. Commun Chem. 2021. PMID: 36697616 Free PMC article.
Our data indicate that the stability of this material is primarily controlled by the formation of a layer of USiO(4) (the mineral, coffinite) at the surface of U(3)Si(2). The results also show that these layers are destabilized at T > 300 C, leading to the complete deco …
Our data indicate that the stability of this material is primarily controlled by the formation of a layer of USiO(4) (the mineral, coffin …
A comparative bio-oxidative leaching study of synthetic U-bearing minerals: Implications for mobility and retention.
Yang Y, Ram R, McMaster SA, Pownceby MI, Chen M. Yang Y, et al. J Hazard Mater. 2021 Feb 5;403:123914. doi: 10.1016/j.jhazmat.2020.123914. Epub 2020 Sep 13. J Hazard Mater. 2021. PMID: 33264966
In this study, the effects of bio-oxidative leaching on several synthetic uranium minerals - Uraninite [UO(2)], Pitchblende [U(3)O(8)], Coffinite [USiO(4)], Brannerite [UTi(2)O(6)] and Betafite [(U,Ca)(2)(Ti,Nb,Ta)(2)O(7)]) compared to chemical leaching in the presence of …
In this study, the effects of bio-oxidative leaching on several synthetic uranium minerals - Uraninite [UO(2)], Pitchblende [U(3)O(8)], C …
A multi-scalar study of the long-term reactivity of uranium mill tailings from Bellezane site (France).
Ballini M, Chautard C, Nos J, Phrommavanh V, Beaucaire C, Besancon C, Boizard A, Cathelineau M, Peiffert C, Vercouter T, Vors E, Descostes M. Ballini M, et al. J Environ Radioact. 2020 Jul;218:106223. doi: 10.1016/j.jenvrad.2020.106223. Epub 2020 Mar 13. J Environ Radioact. 2020. PMID: 32174445
The uranium is distributed partly in micrometer scale uraninite and coffinite refractory phases embedded in grains of quartz, and partly sorbed to smectite and ferric oxyhydroxides. ...
The uranium is distributed partly in micrometer scale uraninite and coffinite refractory phases embedded in grains of quartz, and par …
25 results