Citation: Zhang, Wenyao; Wei, Zhonglei; Yang, Zhihua; Pan, Shilie (2020). Two new ammonium/alkali-rare earth metal difluorophosphates ALa(PO2F2)4 (A = NH4 and K) with moderate birefringence and short cutoff edges.. Dalton transactions (Cambridge, England : 2003), 49, pp. 11591-11596.