Rational design of large birefringence infrared oxychalcogenides via heteroanionic octahedron engineering.

Authors

Xinyao Qi, Haonan Liu, Yujie Zhang, Shihui Ma, Hongping Wu, Zhanggui Hu, Hongwei Yu

Published in

Chemical communications (Cambridge, England). Sep 17, 2026. Epub Sep 17, 2026.

Abstract

To overcome low birefringence in IR chalcogenides caused by symmetric tetrahedra, we designed Ba3SnGe2O8S and Sr2SnGeO4S2. Notably, Sr2SnGeO4S2 features the first distorted [SnO₂S₄] heteroanionic octahedra reported in oxychalcogenides, enabling a remarkably enhanced birefringence of 0.134@1064 nm versus 0.020@1064 nm in Ba3SnGe2O8S, alongside large band gaps and broad IR transmission.

PMID:
42750659
Bibliographic data and abstract were imported from PubMed on 17 Sep 2026.

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