Citation: Chen, Zilong; Li, Zijian; Chu, Dongdong; Zhang, Fangfang; Li, Xiaojing; Yang, Zhihua; Long, Xifa; Pan, Shilie (2022). A2B6O9F2 (A = NH4, K): New members of A2B6O9F2 family with deep-UV cutoff edge and moderate birefringence. Chemical Communications, , pp. -.