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Synthesis and Magnetic Properties of the KCu(IO3)(3) Compound with [CuO5](infinity) Chains
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 62019 (English)In: Acs Omega, ISSN 2470-1343, Vol. 4, no 12, p. 15168-15174Article in journal (Refereed) Published
Abstract [en]

The new quaternary iodate KCu(IO3)(3) has been prepared by hydrothermal synthesis. KCu(IO3)(3) crystallizes in the monoclinic space group P2(1)/n with unit cell parameters a = 9.8143(4) angstrom, b = 8.2265(4) angstrom, c = 10.8584(5) angstrom,beta = 91.077(2)degrees, and z = 4. The crystals are light blue and translucent. There are three main building units making up the crystal structure: [KO10] irregular polyhedra, [CuO6] distorted octahedra, and [IO3] trigonal pyramids. The Jahn-Teller elongated [CuO6] octahedra connect to each other via corner sharing to form [CuO5](infinity) zigzag chains along [010]; the other building blocks separate these chains. The Raman modes can be divided into four groups; the lower two groups into mainly lattice modes involving K and Cu displacements and the upper two groups into mainly bending and stretching modes of [IO3E], where E represents a lone pair of electron. At low temperatures, the magnetic susceptibility is characterized by a broad maximum centered at similar to 5.4 K, characteristic for antiferromagnetic short-range ordering. Long-range magnetic ordering at T-C = 1.32 K is clearly evidenced by a sharp anomaly in the heat capacity. The magnetic susceptibility can be very well described by a spin S = 1/2 antiferromagnetic Heisenberg chain with a nearest-neighbor spin exchange of similar to 8.9 K.

Place, publisher, year, edition, pages
2019. Vol. 4, no 12, p. 15168-15174
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Chemical Sciences
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URN: urn:nbn:se:su:diva-175741DOI: 10.1021/acsomega.9b02064ISI: 000488838700057PubMedID: 31552362OAI: oai:DiVA.org:su-175741DiVA, id: diva2:1369227
Available from: 2019-11-11 Created: 2019-11-11 Last updated: 2019-11-11Bibliographically approved

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Mitoudi-Vagourdi, EleniRienmüller, JuliaJohnsson, Mats
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