9:30 AM - 11:30 AM [16a-PB06-5] Visible luminescence characteristics of Na5R4(SiO4)4F5 (R = Y, Gd): Yb3+, Er3+under infrared irradiation 〇(M2)Kanaha Tamura1, Wataru Nishii1, Hiroaki Samata1 (1.Kobe Univ.)