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Journal Articles Journal of Nuclear Materials Year : 2019

Direct synthesis of pure brannerite UTi2O6

Adel Mesbah
Nicolas Clavier
Marion Turuani
Flavien Choulet
  • Function : Author
  • PersonId : 915346
Nicolas Dacheux

Abstract

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.
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Dates and versions

hal-01979146 , version 1 (13-11-2020)

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Adel Mesbah, Stephanie Szenknect, Nicolas Clavier, Hantao Lin, Fabien Baron, et al.. Direct synthesis of pure brannerite UTi2O6. Journal of Nuclear Materials, 2019, 515, pp.401-406. ⟨10.1016/j.jnucmat.2019.01.003⟩. ⟨hal-01979146⟩
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