Superstructures and Chemical Bonding in Rare Earth Metal Polytellurides RETe2-δ (RE=La−Nd; Sm−Tm; 0≤δ≤0.2)
Research output: Contribution to journal › Review article › Contributed › peer-review
Contributors
Abstract
Polychalcogenides REX2-δ (X=S, Se, Te; 0≤δ≤0.2) of trivalent rare earth metals RE have been investigated in recent years to shed light on the structural diversity as a function of compositional, metric, thermodynamic, and electronic situation. Whereas the former aspects have comparable influence on the structures of all polychalcogenides REX2-δ, the bonding situation was assumed different for tellurides due to tellurium's higher tendency to delocalize electrons. The crystal structures generally contain puckered [REX] double slabs and planar [X] layers, the latter hosting different distortions from a square-like arrangement. The distortion patterns of sulfides and selenides can be understood by a Zintl-type approach; they are dominated by localization of valence electrons in mono- (X2−) or dinuclear (X22−) anions only. This review discusses crystal structures of some rare-earth metal polytellurides RETe2-δ (0≤δ≤0.2) and bonding features in the chalcogenide layers and relates them to their sulfide and selenide counterparts.
Details
Original language | English |
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Article number | e202300118 |
Number of pages | 12 |
Journal | Zeitschrift fur Anorganische und Allgemeine Chemie |
Volume | 649(2023) |
Issue number | 16 |
Publication status | Published - 30 Jun 2023 |
Peer-reviewed | Yes |
External IDs
ORCID | /0000-0001-7523-9313/work/159171517 |
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Keywords
ASJC Scopus subject areas
Keywords
- electron localizability indicator, modulated structures, Polytellurides, rare earth elements, superstructures