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NH4Y(SO4)2·H2O and NH4YSO4F2: Two New Ammonium‐Rare Earth Metal Sulfates with Enhanced Optical Anisotropy and Deep Ultraviolet Transmission.

NH4Y(SO4)2·H2O and NH4YSO4F2: Two New Ammonium‐Rare Earth Metal Sulfates with Enhanced Optical Anisotropy and Deep Ultraviolet Transmission.

Authors :
Zhang, Luyong
Wang, Shibin
Wu, Zhencheng
Hou, Xueling
Yang, Zhihua
Zhang, Fangfang
Pan, Shilie
Source :
Crystal Research & Technology. Sep2024, Vol. 59 Issue 9, p1-7. 7p.
Publication Year :
2024

Abstract

Tetrahedral oxygenated groups with large highest occupied molecular orbital‐lowest unoccupied molecular orbital (H gaps such as [SO4] are beneficial for deep ultraviolet (DUV) transmission but usually make against generating sufficient birefringence due to the small polarizability anisotropy. Thus, it is extremely difficult to obtain DUV transmission and large birefringence simultaneously in the search for DUV birefringent materials in sulfates. Herein, two new ammonium‐rare earth metal sulfates, NH4Y(SO4)2·H2O and NH4YSO4F2, with DUV transmission are presented. Meanwhile, both exhibit greatly elevated birefringence through the involvement of NH4+ units, compared to Y2(SO4)3·8H2O. Their optical properties are further investigated by theoretical calculations, and the effect of the introduction of NH4+ into yttrium sulfate on optimizing the structures and properties is discussed. This work may provide a new perspective for further exploration of DUV birefringent materials in tetrahedral oxygenated group sulfates. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02321300
Volume :
59
Issue :
9
Database :
Academic Search Index
Journal :
Crystal Research & Technology
Publication Type :
Academic Journal
Accession number :
180293573
Full Text :
https://doi.org/10.1002/crat.202400072