(CsX)Cu5O2(PO4)2 (X = Cl, Br, I): A Family of Cu2+ S = 1/2 Compounds with Capped-Kagomé Networks Composed of OCu4 Units

Michał Jerzy Winiarski; Thao Tran; Juan Chamorro; Tyrel McQueen

doi:10.1021/acs.inorgchem.8b03464

(CsX)Cu5O2(PO4)2 (X = Cl, Br, I): A Family of Cu2+ S = 1/2 Compounds with Capped-Kagomé Networks Composed of OCu4 Units

Abstract

Three new salt inclusion compounds (CsX)Cu5O2(PO4)2 (X = Cl, Br, I), phosphate analogues of the kagomé mineral averievite, are reported. Their crystal structures are composed of trigonal networks of corner-sharing OCu4 anion-centered tetrahedra, forming capped-kagomé planes, which can also be regarded as two-dimensional slices along the [111] direction of a pyrochlore lattice. Magnetization and heat capacity measurements reveal strong geometric frustration of this network and complex magnetic behavior. X-ray and neutron diffraction studies show that all three compounds undergo a trigonal-to-monoclinic phase transition upon cooling, with a first-order phase transition seen in CsBr and CsI analogues. Along with the previously reported (CsCl)Cu5O2(VO4)2, these three new compounds belong to a large family of OCu4-based networks, which are a playground for studying frustrated quantum magnetism.

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Authors (4)

Michał Jerzy Winiarski dr inż.
Thao Tran
- Johns Hopkins University Department of Chemistry, Department of Physics and Astronomy, and Institute for Quantum Matter
Juan Chamorro
- Johns Hopkins University Department of Chemistry, Department of Physics and Astronomy, and Institute for Quantum Matter
Tyrel McQueen
- Johns Hopkins University Department of Chemistry, Department of Physics and Astronomy, Department of Materials Science and Engineering, and Institute for Quantum Matter

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Publication version: Accepted or Published Version
DOI:: Digital Object Identifier (open in new tab) 10.1021/acs.inorgchem.8b03464
License: Copyright (2019 American Chemical Society)

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: INORGANIC CHEMISTRY no. 58, edition 7, pages 4328 - 4336,
ISSN: 0020-1669
Language:: English
Publication year:: 2019
Bibliographic description:: Winiarski M., Tran T., Chamorro J., Mcqueen T.: (CsX)Cu5O2(PO4)2 (X = Cl, Br, I): A Family of Cu2+ S = 1/2 Compounds with Capped-Kagomé Networks Composed of OCu4 Units// INORGANIC CHEMISTRY. -Vol. 58, iss. 7 (2019), s.4328-4336
DOI:: Digital Object Identifier (open in new tab) 10.1021/acs.inorgchem.8b03464
Verified by:: Gdańsk University of Technology