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NdF3 single crystal was efficiently grown from the melt by the micro-pulling-down (Â¿-PD) method. The grown crystal had a single phase confirmed by XRD. Then Optical properties and Â¿-ray excited scintillation properties in Vacuum Ultraviolet (VUV) wavelength region were investigated. It showed 60-80% transmittance down to 170 nm, and broad luminescence centered at 175 nm. The light yield and decay time of it were also evaluated under 5.5 MeV Â¿-ray excitation (241Am). The light yield was evaluated to be 60 Â± 6 [Ph / 5.5 MeV-Â¿], and the decay time was also evaluated to be 6.9 ns under 5.5 MeV a-ray excitation.