CC BY 4.0 UnportedIsaeva, A.Schönemann, R.Doert, T.2020-07-172020-07-172020https://doi.org/10.34657/3559https://oa.tib.eu/renate/handle/123456789/4930The three compounds Tl9RETe6 with RE = Ce, Sm, Gd were synthesized from the elements at 1020 K. Their isostructural crystal structures are ordered derivatives of the Tl5Te3 type with rare-earth metal and thallium occupying different Wyckoff positions. The structures can be understood as charge-ordered in accordance with the Zintl-Klemm concept: 9 Tl+ + RE3+ + 6 Te2-. DFT calculations for Tl9GdTe6, however, result in a low, but finite density of states at the Fermi level. Magnetic data confirm trivalent Gd, but indicate a small amount of Ce4+ in Tl9CeTe6; no indications for long-range magnetic order was found down to T = 2 K.enghttps://creativecommons.org/licenses/by/4.0/540Crystal structureMagnetic propertiesRare-earth metalsTelluridesThalliumArticle