A new family of rare earth – strontium tellurite chlorides, SrLn4(TeO3)4Cl6 (Ln = Ce, Nd, Sm): Synthesis, crystal structures, possible polytypism, and crystal-chemical relationships

Авторы: Charkin Dmitri O., Volkov Sergey N., Grishaev Vasili Yu, Dolgikh Valeri A., Kuznetsov Alexey N., Deyneko Dina V., Lyssenko Konstantin A., Aksenov Sergey M.
Журнал: Journal of Solid State Chemistry
Том: 320
Год издания: 2023
Издательство: Elsevier B.V.
Местоположение издательства: Netherlands
Номер статьи: 123822
DOI: 10.1016/j.jssc.2022.123822
Аннотация: An interaction of LnOCl and TeO2 (Ln ¼ Ce, Nd, Sm) in molten SrCl2 results in a new family of layered quinarycompounds, SrLn4(TeO3)4Cl6. Their monoclinic structures (P2/c) correspond to a novel structure type, build up bythe alternation of [M2Ln3(TeO3)4] layers (M ¼ Ln0.5Sr0.5) and double halide sheets. New compounds are characterizedby the modular type of the structures, while the presence of the twinning indicates the possible stackingdisorder and polytypic character. An accurate analysis indicates that crystal structures belong to the OD (“orderdisorder”)family of category III with one types of nonpolar OD layers and can be described by the same OD familygroupoid. Possible maximal degree order polytypes have been predicted and crystal chemical relationships amongthe oxyhalides of rare earth and lone-pair cations are briefly discussed.
Добавил в систему: Дейнеко Дина Валерьевна

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