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

Journal Article (2023)
Authors

A. van Hattem (TU Delft - RST/Reactor Physics and Nuclear Materials)

J. Vlieland (TU Delft - RST/Technici Pool)

R. Dankelman (TU Delft - RID/TS/Technici Pool)

M.A. Thijs (TU Delft - RID/TS/Technici Pool)

Gilles Wallez (Universite Pierre et Marie Curie (UPMC))

Kathy Dardenne (Karlsruhe Institut für Technologie)

J. Rothe (Karlsruhe Institut für Technologie)

Rudy J.M. Konings (TU Delft - RST/Reactor Physics and Nuclear Materials)

A. L. Smith (TU Delft - RST/Reactor Physics and Nuclear Materials)

Research Group
RST/Reactor Physics and Nuclear Materials
Copyright
© 2023 A. van Hattem, J. Vlieland, B.J.R. Dankelman, M.A. Thijs, Gilles Wallez, Kathy Dardenne, Jörg Rothe, R. Konings, A.L. Smith
To reference this document use:
https://doi.org/10.1021/acs.inorgchem.3c00241
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 A. van Hattem, J. Vlieland, B.J.R. Dankelman, M.A. Thijs, Gilles Wallez, Kathy Dardenne, Jörg Rothe, R. Konings, A.L. Smith
Research Group
RST/Reactor Physics and Nuclear Materials
Issue number
18
Volume number
62
Pages (from-to)
6981-6992
DOI:
https://doi.org/10.1021/acs.inorgchem.3c00241
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Abstract

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 elucidated, and it was found to crystallize in the space group R3̅m (No. 166), i.e., with a palmierite structure. In addition, the oxidation state of Mo in the low-temperature phase α-Cs2Pb(MoO4)2 was studied using X-ray absorption near-edge structure spectroscopy. Phase diagram equilibrium measurements in the Cs2MoO4-PbMoO4 system were performed, revisiting a previously reported phase diagram. The equilibrium phase diagram proposed here includes a different composition of the intermediate compound in this system. The obtained data can serve as relevant information for thermodynamic modeling in view of the safety assessment of next-generation lead-cooled fast reactors.