The quaternary compound CsPb(MoO) 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-CsPb(MoO) was elucidated, and it was found to crystallize in the space group 3̅ (No. 166), i.e., with a palmierite structure. In addition, the oxidation state of Mo in the low-temperature phase α-CsPb(MoO) was studied using X-ray absorption near-edge structure spectroscopy. Phase diagram equilibrium measurements in the CsMoO-PbMoO 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.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c00241 | DOI Listing |
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