(CsX)CuO(PO) (X = Cl, Br, I): 一类具有 OCu 单元构成的帽型 Kagomé 网络的 Cu-S = / 化合物。
(Cs X)CuO(PO) ( X = Cl, Br, I): A Family of Cu S = / Compounds with Capped-Kagomé Networks Composed of OCu Units.
机构信息
Department of Chemistry, Department of Physics and Astronomy, and Institute for Quantum Matter , Johns Hopkins University , Baltimore , Maryland 21218 , United States.
Faculty of Applied Physics and Mathematics , Gdansk University of Technology , ul. Narutowicza 11/12 , 80-233 Gdansk , Poland.
出版信息
Inorg Chem. 2019 Apr 1;58(7):4328-4336. doi: 10.1021/acs.inorgchem.8b03464. Epub 2019 Mar 11.
Three new salt inclusion compounds (Cs X)CuO(PO) ( X = Cl, Br, I), phosphate analogues of the kagomé mineral averievite, are reported. Their crystal structures are composed of trigonal networks of corner-sharing OCu 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)CuO(VO), these three new compounds belong to a large family of OCu-based networks, which are a playground for studying frustrated quantum magnetism.
三种新的盐包合物（Cs X）CuO（PO）（X = Cl、Br、I），即层状矿物埃列维茨矿的磷酸盐类似物，被报道出来。它们的晶体结构由顶角共享 OCu 阴离子中心四面体组成的三角网络构成，形成了盖帽型的三角晶格，也可以被视为沿着 [111] 方向的二维薄片。磁化和热容测量揭示了这个网络的强烈几何各向异性和复杂的磁行为。X 射线和中子衍射研究表明，所有三种化合物在冷却时都会经历三角到单斜相的转变，在 CsBr 和 CsI 类似物中观察到一级相变。与之前报道的（CsCl）CuO（VO）一起，这三种新化合物属于一个由 OCu 为基础的网络大家族，这是研究受挫量子磁体的游乐场。
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