LiCaAlF₆ is a versatile host material. Applications of this host as a scintillation detector and solid state laser have been reported quite frequently. Thermo luminescence glow curve structure of LiCaAlF₆ based phosphors is sensitive to various factors such as preparation method and purity. For LiCaAlF₆:Eu, co-doping with other rare earths simplifies the glow curve structure. It is reported here that LiCaAlF₆:Eu, La is a highly sensitive thermo luminescence as well as optically stimulated luminescence phosphor with a simple glow curve structure. Results on the detailed characterization in context of possible applications to the dosimetry of ionizing radiations are presented.