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Articles by Timothy Ablott
Variable Temperature Studies of Two Calcium Uranates α-Ca 3 UO 6 and Ca 2 UO 5
1 Introduction Uranium oxides dominate the nuclear fuel cycle (NFC), with uranium dioxide (UO2) used as the major fuel in the current generation of fission reactors [1]. The safe handling and long-term storage of spent nuclear fuel are of paramount importance in closing this cycle. Geological repositories are currently viewed as the optimal solution for the long-term storage of spent nuclear fuel following waste processing and immobilization [2].
Thermal Stability of LiNixMnyCozO2 Cathode Materials
Abstract Click to copy section linkSection link copied! The thermal evolution of LiNixMnyCozO2 (NMC) lithium-ion battery electrode materials is examined at various states of charge (SOC) or lithium concentrations for a variety of Ni:Mn:Co ratios or electrode compositions. Synchrotron X-ray diffraction (XRD) combined with Rietveld analysis shows the onset decomposition temperatures of phases, decomposition products, lattice parameters, and phase fractions as a function of composition and SOC.
Expanding Uranium Oxide Hydrate Frameworks toward Early Lanthanides: Cases for Pr(III) and Nd(III) Ions
The single-crystal data and structure refinement for the two materials are described in Table 1 , with selected bond lengths and angles provided in Tables S1 and S2 (SI) for UOHF-Pr and UOHF-Nd , respectively. Both UOHF-Pr and UOHF-Nd crystallize in the orthorhombic space group C 222 1 , being isostructural.
Capturing ammonium nitrate in a synthetic uranium oxide hydrate phase: revealing the role of ammonium ions and anion inclusions
Capturing ammonium nitrate in a synthetic uranium oxide hydrate phase: revealing the role of ammonium ions and anion inclusions Although uranium oxide hydrate (UOH) minerals and synthetic phases have been extensively studied, the role of ammonium ions in the formation of UOH materials is not well understood. In this work, the stabilization of a synthetic UOH phase with ammonium ions and the inclusion of ammonium nitrate were investigated using a range of structural and spectroscopic techniques.
Investigation of uranium oxide hydrates with barium(II) ions: structural diversity, uranium valences and implications
Investigation of uranium oxide hydrates with barium(II) ions: structural diversity, uranium valences and implications Kim Lu, Yingjie Zhang, Tao Wei, Timothy Ablott, Jakub Plášil, Inna Karatchevtseva and Rongkun Zheng Abstract Although barium(II) ions play an important role in the natural weathering of the mineral uraninite (UO2+x) and are expected to therefore do the same for spent nuclear fuel in geological disposal, the detailed structural understanding of this role is rather limited.
Uranium oxide hydrate frameworks with Er(III) or Y(III) ions: Revealing structural insights leading to the low symmetry
Uranium oxide hydrate frameworks with Er(III) or Y(III) ions: Revealing structural insights leading to the low symmetry Timothy Ablott, Kim Lu, Robert Aughterson and Yingjie Zhang Abstract Two new mixed-valence uranium oxide hydrate frameworks (UOFs), incorporating either Er3+ or Y3+ ions, were successfully synthesised under hydrothermal conditions and characterised with single-crystal X-ray diffraction and a variety of other structural and spectroscopic techniques.
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