A unique [Sb₆O₂S₁₃]¹²⁻finite chain in oxychalcogenide Ba₆Sb₆O₂S₁₃leading to ultra-low thermal conductivity and giant birefringence

Abstract

Recently, heteroanionic materials are drawing wide attention due to their unique crystal structures which result in fascinating physical properties. However, structural exploration and functional application of lone-pair-cation-based oxychalcogenides are still...

Partial substitution with a significant effect: coexistence of a wide band gap and large birefringence in the oxychalcogenide AEGe2O4Se (AE = Sr and Ba)

“…Notably, AEGe 2 O 4 Se (AE = Sr and Ba) exhibits a coexistence of large calculated Δ n values (0.209 and 0.238@2050 nm) and wide experimental E g values (3.57 and 3.81 eV), indicating their potential as birefringent crystals in the ultraviolet–visible–infrared band. 40…”

Rare-earth-based chalcogenides and their derivatives: an encouraging IR nonlinear optical material candidate

“…215–228 This leads to distortions and the display of significant static dipole moments and anisotropy. 229–233 Unlike traditional chalcogenides, the presence of heteroanionic groups combines the high polarizability of chalcogenides with the advantages of oxides and halides that have wide E g . RE-based chalcohalides and oxychalcogenides not only incorporate disparate anions but also feature the presence of salt-inclusion compounds.…”