Lone-Pair Enhanced Birefringence in an Alkaline-Earth Metal Tin(II) Phosphate BaSn2 (PO4 )2

Yi Yang; Yi Qiu; Pifu Gong; Lei Kang; Gaomin Song; Xiaomeng Liu; Junliang Sun; Zheshuai Lin

doi:10.1002/chem.201806108

Lone-Pair Enhanced Birefringence in an Alkaline-Earth Metal Tin(II) Phosphate BaSn₂ (PO₄ )₂

Chemistry. 2019 Apr 17;25(22):5648-5651. doi: 10.1002/chem.201806108. Epub 2019 Mar 19.

Authors

Yi Yang^{1

2}, Yi Qiu³, Pifu Gong¹, Lei Kang¹, Gaomin Song^{1

2}, Xiaomeng Liu^{1

2}, Junliang Sun³, Zheshuai Lin^{1

2}

Affiliations

¹ Beijing Center for Crystal R&D, Key Lab of Functional Crystals and Laser Technology, of the Chinese Academy of Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
² University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.

PMID: 30746816
DOI: 10.1002/chem.201806108

Abstract

The first alkaline-earth metal tin(II) phosphate, BaSn₂ (PO₄ )₂ , has been discovered, which consists of layered structures constructed from strictly alternating [SnO₃ ]^4- and [PO₄ ]^3- moieties. This compound is expected to have a large birefringence with Δn≈0.071 at 1064 nm, owing to the presence of stereochemically active lone pair metal cations.

Keywords: birefringence; crystal; first-principles calculations; lone pair electrons; tin(II) phosphates.

Abstract

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