Hydrothermal synthesis of new mixed-oxoanion materials: Rare earth iodate sulfates Sm(IO3)(SO4) and Ln2(IO3)3(SO4)OH·3H2O (Ln = Sm, Eu, Dy)
Abstract
Chemical systems that contain non-centrosymmetric anions with electron lone pairs promote the formation of non-centrosymmetric phases. To probe this approach in mixed anion systems, we investigated crystallization in iodate-sulfate systems under mild hydrothermal conditions. By using different SO4 concentrations, the Sm(IO3)(SO4) and Ln2(IO3)3(SO4)OH·3H2O (Ln = Sm, Eu, Dy) structures were synthesized. It was observed that the reaction was very sensitive to the sulfate concentration. The structures were determined by single-crystal X-ray diffraction, where Sm(IO3)(SO4) crystallizes in the monoclinic crystal system adopting the space group P21/c and Ln2(IO3)3(SO4)OH·3H2O (Ln = Sm, Eu, Dy) crystallize in the triclinic crystal system adopting the space group P 1 ‾ .
- Publication:
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Solid State Sciences
- Pub Date:
- July 2022
- DOI:
- 10.1016/j.solidstatesciences.2022.106918
- Bibcode:
- 2022SSSci.12906918A
- Keywords:
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- Iodate sulfate;
- Mild hydrothermal synthesis;
- Mixed-oxoanion material