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Sn 2 B 5 O 9 Cl: A Material with Large Birefringence Enhancement Activated Prepared via Alkaline‐Earth‐Metal Substitution by Tin
Author(s) -
Guo Jingyu,
Tudi Abudukadi,
Han Shujuan,
Yang Zhihua,
Pan Shilie
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201911187
Subject(s) - isostructural , birefringence , materials science , alkaline earth metal , boron , tin , crystallography , metal , inorganic chemistry , chemistry , optics , crystal structure , organic chemistry , physics , metallurgy
The excellent birefringent materials are needed for optical systems. Herein, we reported a new compound, the first tin borate chloride, Sn 2 B 5 O 9 Cl (SBOC) with a large birefringence (0.168 at 546 nm) measured by the polarizing microscope. Its birefringence is 16 times that of the isostructural Ba 2 B 5 O 9 Cl (BBOC) compound (0.010@ at 546 nm). The results show that the birefringence enhancement originates mainly from the Sn 2+ polyhedra. We propose that the birefringence can be enlarged by substituting the alkaline‐earth metal cation by the Sn 2+ cation in the isostructural borate with small birefringence. This strategy will guide the discovery of large birefringent materials in the future.