Journal Article

Cs.sub.2Pb.sub.2: a novel mixed-metal carbonate with rare Pb-C-O one-dimensional chain

Jing, Qun, Hu, Mei, Wang, Jialong, Chen, Zhaohui, Jiang, Yi, Duan, Haiming

2024

Overview

Carbonates deserve to be pursued in the exploration of candidate systems for birefringent crystalline materials. Recently, we successfully obtained a novel example of a mixed-metal carbonate, Cs.sub.2Pb(CO.sub.3).sub.2, using a high-temperature solution method in a closed system. Structural analysis shows that the rare Pb-C-O one-dimensional chain structure is formed by interconnecting the fundamental building blocks of PbC.sub.2O.sub.8. Detailed structural analyses and comparisons suggest a non-coplanar arrangement of CO.sub.3 due to the highly distorted polyhedra formed by Pb.sup.2+. Theoretical calculations indicate that Cs.sub.2Pb(CO.sub.3).sub.2 exhibits an average calculated birefringence of 0.037 @ 1.64 nm, which is consistent with the conclusions deduced from the structure. The source of the properties is further elucidated through real-space atom cutting. This work provides a good reference idea for designing and synthesizing new carbonate optical crystal materials.

• Publisher: Springer
• Subject: Carbonates