Structural Studies and Thermal Analysis in the Cs₂MoO₄-PbMoO₄ System with Elucidation of β-Cs₂Pb(MoO₄)₂

The quaternary compound Cs₂Pb(MoO₄)₂ was synthesized and its structure was characterized using X-ray and neutron diffraction from 298 to 773 K, while thermal expansion was studied from 298 to 723 K. The crystal structure of the high-temperature phase β-Cs₂Pb(MoO₄)₂ was...

New insights and coupled modelling of the structural and thermodynamic properties of the LiF-UF4 system

© 2021 The Authors LiF-UF4 is a key binary system for molten fluoride reactor technology, which has not been scrutinized as thoroughly as the closely related LiF-ThF4 system. The phase diagram equilibria in the system LiF-UF4 are explored in this work with X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The short-range...

Examination of the short-range structure of molten salts: ThF₄, UF₄, and related alkali actinide fluoride systems

The short-range structures of LiF-ThF4, NaF-AnF4, KF-AnF4, and Cs-AnF4 (An = Th, U), were probed using in situ high temperature Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Signally, the EXAFS spectra of pure molten ThF4 and UF4 were measured for the first time. The data were interpreted with the aid of Molecular Dynamics ...

Melting behaviour of uranium-americium mixed oxides under different atmospheres

In the context of a comprehensive campaign for the characterisation of transmutation fuels for next generation nuclear reactors, the melting behaviour of mixed uranium-americium dioxides has been experimentally studied for the first time by laser heating, for Am concentrations up to 70 mol. % under different types of atmospheres. Extensive...

Extreme multi-valence states in mixed actinide oxides

To assure the safety of oxide-fuel based nuclear reactors, the knowledge of the atomic-scale properties of U_1−yM_yO_2±x materials is essential. These compounds show complex chemical properties, originating from the fact that actinides and rare earths may occur with different oxidation states. In these mostly...

In situ high-temperature EXAFS measurements on radioactive and air-sensitive molten salt materials

The development at the Delft University of Technology (TU Delft, The Netherlands) of an experimental set-up dedicated to high-temperature in situ EXAFS measurements of radioactive, air-sensitive and corrosive fluoride salts is reported. A detailed description of the sample containment cell, of the furnace design, and of the measurement...

Most important aspects of the work environment: A comparison between two countries

The purpose of this paper is to explore similarities and dissimilarities in work environment priorities of Finnish and Dutch office users. It also explores if people from different age groups have different priorities. As such this study contributes to a better understanding of user needs and preferences with regard to their physical work...

Electron beam studies of the diffusive separation of helium-argon mixtures in free jets and shock waves

A numerical solution for the free-molecule impact-pressure probe relations for tubes of arbitrary lenght

Höhere Mathematik Teil III: Raumkurven und flächen linienintegrale und mehrfache integrale gewöhnliche und partielle diferentialgleichungen nebst anwendungen

Höhere Mathematik Teil II: Integralrechnung . Unendlichen reihen Vektorrechnung nebst anwendungen

Höhere Mathematik Teil I: differentialrechnung und grundformeln der integralrechnung nebst anwendungen