LAUSR

Abstract In this paper, the lamellar fluorphlogopite was structurally modified by the adjustment of layer charge and the rare earth Eu 3+ was doped to fluorphlogopite with a subsequent high temperature solid state reaction process. The structural modification involved a preliminary treatment of fluorphlogopite with HNO 3 and oxalic acid to reduce the layer charge density, and part of the charge-reduced fluorphlogopite was converted to a homoionic Na form by ion exchange with NaCl or NaB(C 6 H 5 ) 4 . It has been noticed that the interlayer spacing of modified fluorphlogopite is decreased as compared with the original fluorphlogopite due to the ionic radius difference between K + and Na + . The photoluminescence study suggests that adjustment of layer charge of fluorphlogopite is beneficial to enhance the luminescence intensity excited with near UV light, and the layered system may be a potential red light component for the use of solid-state lighting and other optoelectronic fields.