Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (2): 229-235.DOI: 10.19894/j.issn.1000-0518.220225

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Synthesis, Crystal Structure and Birefringence Properties of Silver Cluster Compound Ag3B6O10I

Zhi-Peng DU, Yang ZHOU, San-Gen ZHAO()   

  1. State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
  • Received:2022-06-26 Accepted:2022-09-04 Published:2023-02-01 Online:2023-02-27
  • Contact: San-Gen ZHAO
  • About author:zhaosangen@fjirsm.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(22122507);the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024);the National Key Research and Development Program of China(2019YFA0210400)

Abstract:

Birefringent crystals that can modulate the polarization of light play a significant role in modern optical devices including polarizing microscopes, optical isolators, and achromatic quarter-wave plates. Here we report a new silver cluster compound, Ag3B6O10I, which features a three-dimensional pore structure formed by the connection of [B6O102- fundamental structural units, with the Ag3I triangular pyramidal located in the pores. This structure with [B6O102- as the basic unit is reported in silver cluster borate for the first time. This compound crystallizes in the Pnma (No.62) space group with a=1.2741(3) nm, b=0.97378(19) nm, c=0.83971(17) nm. It is a non-congruent melting compound and can be stable below 963 K. Notably, Ag3B6O10I has a wide band gap (>3.1 eV), and exhibits a large linear optical response, that is, birefringence of Δn=0.031 at the wavelength of 550 nm. Moreover, the structure-property relationships in Ag3B6O10I are analyzed by first-principles calculations. This work suggests new possibilities for the design and fabrication of advanced birefringent crystals using the silver cluster.

Key words: Borates, Silver cluster, Crystal structure, Birefringence, First-principles calculations

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