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Open AccessArticle

Novel S = 1/2 Kagome Lattice Materials: Cs2TiCu3F12 and Rb2TiCu3F12

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School of Chemistry and EaStChem, University of St Andrews, St Andrews KY16 9ST, UK
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Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 GSP-1 Moscow, Russia
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Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0DE, UK
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Department of Low Temperature Physics and Superconductivity, Physics Faculty, M. V. Lomonosov Moscow State University, 119991 GSP-1 Moscow, Russia
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Theoretical Physics and Applied Mathematics Department, Ural Federal University, 620002 Ekaterinburg, Russia
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National University of Science and Technology "MISiS", 119049 Moscow, Russia
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School of Chemistry and EaStChem, University of Edinburgh, Edinburgh EH9 3JZ, UK
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Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Crystals 2015, 5(2), 226-243; https://doi.org/10.3390/cryst5020226
Received: 18 March 2015 / Revised: 16 April 2015 / Accepted: 21 April 2015 / Published: 5 May 2015
Two new members of the A2B′Cu3F12 family of kagome-related materials have been prepared, in order to further understand the crystal-chemical relationships, phase transitions and magnetic behaviour within this family of potentially frustrated S = ½ two-dimensional quantum magnets. Cs2TiCu3F12 adopts a crystal structure with the ideal kagome lattice topology (space group R m) at ambient temperature. Diffraction studies reveal different symmetry-lowering structural phase transitions in single crystal and polycrystalline forms at sub-ambient temperatures, with the single crystal form retaining rhombohedral symmetry and the powder form being monoclinic. In both cases, long-range antiferromagnetic order occurs in the region 16–20 K. Rb2TiCu3F12 adopts a distorted triclinic structure even at ambient temperatures. View Full-Text
Keywords: kagome lattice; magnetic; fluoride; phase transition kagome lattice; magnetic; fluoride; phase transition
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MDPI and ACS Style

Downie, L.J.; Ardashnikova, E.I.; Tang, C.C.; Vasiliev, A.N.; Berdonosov, P.S.; Dolgikh, V.A.; De Vries, M.A.; Lightfoot, P. Novel S = 1/2 Kagome Lattice Materials: Cs2TiCu3F12 and Rb2TiCu3F12. Crystals 2015, 5, 226-243.

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