6533b823fe1ef96bd127e2d5
RESEARCH PRODUCT
Direct synthesis of pure brannerite UTi2O6
Fabien BaronDaniel BeaufortAdel MesbahFlavien ChouletMaurice PagelPhilippe GoncalvesAnne-magali Seydoux-guillaumeAurélien EglingerYann BatonneauJulien MercadierNicolas ClavierStéphanie SzenknectHantao LinVirginie ChaponMarion TuruaniNicolas Dacheuxsubject
Nuclear and High Energy PhysicsUranium titanateMaterials scienceuranium hydroxide Corresponding authorUranium dioxide[SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrographychemistry.chemical_element02 engineering and technology01 natural sciencesUranium hydroxide010305 fluids & plasmaschemistry.chemical_compoundImpurity0103 physical sciencesBrannerite[CHIM]Chemical SciencesGeneral Materials ScienceOxide mineralsPrecipitation (chemistry)Uranium021001 nanoscience & nanotechnologyNuclear Energy and EngineeringchemistryX-ray crystallographyHydroxide0210 nano-technologyTitaniumNuclear chemistrydescription
International audience; A new method based on the precipitation of uranium(IV) and titanium(IV) hydroxide precursors was developed to prepare pure brannerite UTi2O6 samples. In fact, U(IV) dissolved in HCl (6 mol L−1) was mixed to Ti (IV) alkoxyde before a basification step with an excess of NH4OH to obtain a highly reactive nanometric (U,Ti)(OH)4 powder. The obtained powder was then dried under vacuum, pressed into pellets and finally fired at 1300 °C. This method led to the formation of pure brannerite in contrast to previous reported protocols, which showed the formation of impurities such us UO2 and TiO2. The refined unit cell parameters of UTi2O6 led to a = 9.8113(2) Å, b = 3.7681(1) Å, c = 6.9232(1) Å, β = 118.94(1)° and V = 223.9(1) Å3.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-03-01 |