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Issue 18, 2018
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Synthesis, crystal structure and optical properties of a new fluorocarbonate with an interesting sandwich-like structure

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Abstract

A new fluorocarbonate, Na3Zn2(CO3)3F, was synthesized using a subcritical hydrothermal method. Na3Zn2(CO3)3F crystallizes in the space group C2/c with a sandwich-like framework in which the stacked [Zn(CO3)] layers are connected with one another by bridging F atoms and [CO3] groups alternately. Interestingly, each Zn atom is surrounded by one F atom and four O atoms, forming a distorted [ZnO4F] trigonal bipyramid, which is observed for the first time in the carbonate system. Na3Zn2(CO3)3F has high transparency in a wide spectral region ranging from UV to mid IR with a short ultraviolet absorption edge (∼213 nm). First-principles calculations revealed that Na3Zn2(CO3)3F possesses a large birefringence (Δn = 0.11, λ = 589 nm), which is mainly contributed by the coplanar arrangement of [CO3] groups in the ab plane. Na3Zn2(CO3)3F might find applications as a UV birefringence crystal.

Graphical abstract: Synthesis, crystal structure and optical properties of a new fluorocarbonate with an interesting sandwich-like structure

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Publication details

The article was received on 27 Feb 2018, accepted on 05 Apr 2018 and first published on 17 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00760H
Citation: Dalton Trans., 2018,47, 6464-6469
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    Synthesis, crystal structure and optical properties of a new fluorocarbonate with an interesting sandwich-like structure

    C. Tang, X. Jiang, S. Guo, M. Xia, L. Liu, X. Wang, Z. Lin and C. Chen, Dalton Trans., 2018, 47, 6464
    DOI: 10.1039/C8DT00760H

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