2018/11/06 by Hagen Poddig, Tom Donath, Paul Gebauer +5 · 19 citations
Chemistry · Materials Science · Physics and Astronomy · #Alkali metal #Antiferromagnetism #Chemistry #Condensed matter physics #Crystal Structures and Properties #Crystal structure #Crystallography #Dysprosium #Inorganic Chemistry and Materials #Inorganic chemistry #Ion #Isostructural #Lanthanide #Magnetization #Materials science #Monoclinic crystal system #Rare-earth and actinide compounds #Telluride #Terbium
paper · doi:10.1002/zaac.201800382
published in Zeitschrift für anorganische und allgemeine Chemie 644(24), 1886-1896 (Wiley)
openalex publication_date 2018/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Single crystals of the polytellurides RE Te 1.8 of gadolinium, terbium, and dysprosium were prepared by chemical vapor transport and alkali metal halide flux reactions. To determine proper synthesis conditions for the desired target composition, the binary phase diagram Gd‐Te was evaluated by CalPhaD methods. The compounds are isostructural to SmTe 1.8 and crystallize in space group P 4/ n (no. 85) with lattice parameters of a = 966.10(4), 960.00(3), and 957.33(2) pm and c = 1794.15(10), 1785.77(6), and 1779.38(5) pm for GdTe 1.8 , TbTe 1.8 and DyTe 1.8 , respectively. The structures consist of puckered [ RE Te] double slabs and planar telluride layers composed of Te 2 dumbbells and linear Te 3 units in accordance with ELI‐D based bonding analyses. The latter can be understood as a Te 3 4– anion. GdTe 1.8 is a semiconductor with a bandgap of 0.19 eV/0.17 eV (experimental/calculated). Magnetization data confirm trivalent RE ions and indicate antiferromagnetic order at T N = 12 K for TbTe 1.8 and T N = 9.8 K for DyTe 1.8 , whereas GdTe 1.8 remains paramagnetic down to 2 K.