Two New Layered Oxohalides in the System Cu-Yb-Te-O-Cl
2010 (English)In: Solid State Sciences, ISSN 1293-2558, Vol. 12, 536-540 p.Article in journal (Refereed) Published
Two complex lanthanide(III) transition metal(II) tellurium(IV) oxyhalides, Cu3Yb2(TeO3)4Cl4 and Cu3Yb3(TeO3)4Cl6 have been synthesized and the crystal structures were determined by single-crystal X-ray diffraction. Both compounds are layered with only weak connections in between the layers. The layers are made up of [YbO8], [TeO3] and [CuOxCly] polyhedra. In both compounds the strong Lewis acid cations Yb3+ and Te4+ only form bonds to oxygen while Cu2+ form bonds to both oxygen and chlorine. This leads the Cl− ions to be expelled from the bonding volumes of the crystal structures and protrude from the layers. Magnetic susceptibility measurements were performed on a powder sample of Cu3Yb2(TeO3)4Cl4. The Curie–Weiss law found at low temperatures indicates a Curie–Weiss temperature of ca. −5(1) K. However, indication for long-range magnetic ordering could not be observed down to 1.87 K. The two new phases are to the best of our knowledge the first containing all three of Cu, Yb and Te.
Place, publisher, year, edition, pages
2010. Vol. 12, 536-540 p.
Lanthanide; Oxohalide; Stereochemically active lone electron pair; Layered structure; Magnetic properties
Research subject Materials Chemistry
IdentifiersURN: urn:nbn:se:su:diva-49827DOI: 10.1016/j.solidstatesciences.2010.01.002OAI: oai:DiVA.org:su-49827DiVA: diva2:379692