“…KMgF 3 has been widely investigated due to the properties of dielectric characteristics, luminescence, green upconversion, laser action with proper dopants, and applications in fast position-sensitive registration systems [1][2][3][4][5]. Recently, this material doped with rare-earth ions (such as Er 3+ , Ce 3+ ) has attracted extensive attentions because of thermoluminescence (TL), photoluminescence (PL), photoluminescence excitation (PLE), solid state laser and phosphors properties [6][7][8][9][10][11].…”