UV-Transparent SHG Material Explored in an Alkali Metal Sulfate Selenite System
Xin-Wei Zhang,
Zhi-Xiang Wang,
Chun-Li Hu
et al.
Abstract:The first examples of alkali metal selenite sulfates, namely, Na 8 (SeO 3 )(SO 4 ) 3 (1), Na 2 (H 2 SeO 3 )(SO 4 ) (2), and K 4 (H 2 SeO 3 )-(HSO 4 ) 2 (SO 4 ) (3), were successfully synthesized by hydrothermal reactions. Their structures display three different zero-dimensional configurations composed of isolated sulfate tetrahedra and selenite groups separated by alkali metals. Na 8 (SeO 3 )(SO 4 ) 3 (1) features a noncentrosymmetric structure, while Na 2 (H 2 SeO 3 )(SO 4 ) (2) and K 4 (H 2 SeO 3 )(HSO 4 ) … Show more
Birefringent crystals serve as the core elements of polarizing optical devices. However, the inherent challenge of balancing bandgap and birefringence poses a significant hurdle in designing crystals with excellent overall...
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