Citation: Qin Wang, Han Luo, Luli Wang, Ling Huang, Liling Cao, Xuehua Dong, Guohong Zou. KSb₂F₇·2KNO₃: Unveiling the peak birefringence in inorganic antimony oxysalts[J]. Chinese Chemical Letters, ;2025, 36(7): 110173. doi: 10.1016/j.cclet.2024.110173 shu

KSb₂F₇·2KNO₃: Unveiling the peak birefringence in inorganic antimony oxysalts

Qin Wang ^a ,
Han Luo ^a ,
Luli Wang ^a ,
Ling Huang ^{a, *,} ,
Liling Cao ^a ,
Xuehua Dong ^a ,
Guohong Zou ^{b, *,}

a.
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
b.
College of Chemistry, Sichuan University, Chengdu 610065, China

huangl026@sina.com

zough@scu.edu.cn

Received Date: 15 May 2024
Revised Date: 4 June 2024
Accepted Date: 24 June 2024
Available Online: 26 June 2024

Figures(4)

Birefringent materials possess significant optical anisotropy, making them pivotal in modulating light polarization, particularly in laser technology and scientific applications. In this study, five variants of antimony potassium fluoronitrates named SbF₃·KNO₃ (1), SbF₃·3KNO₃ (2), SbF₃·3KSbF₄·KNO₃ (3), KSb₂F₇·3KNO₃ (4), and KSb₂F₇·2KNO₃ (5) were obtained. Remarkably, each compound contains distinct Sb-polyhedra configurations. Compounds 1 and 2 consist of singular [SbF₃] units, compound 3 harbors a mixture of [SbF₃] and [SbF₄] units, while compounds 4 and 5 feature single [SbF₄] units. Interestingly, the birefringence escalates progressively from 1 to 5, and notably, compound 5 exhibits the most pronounced birefringence among all reported inorganic antimony oxysalts. Detailed structural and property analyses affirm that the structural variance among the five compounds underpins the observed differences in birefringence. Moreover, the synergistic interplay between planar π-conjugated NO₃⁻ groups and Sb³⁺ ions with lone-pair electrons facilitates the emergence of substantial polarization anisotropy.
- Structural variance,
- Birefringent materials,
- Antimony nitrate,
- π-Conjugated,
- Lone pair of electrons
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KSb₂F₇·2KNO₃: Unveiling the peak birefringence in inorganic antimony oxysalts