The Effect of Quartz Sand on Structural and Optical Properties of Dy3+ Doped P2O5-CaO-BaO-Gd2O3 Glasses. J. Phys. Soc. Ind. [Internet]. 2025 Oct. 31 [cited 2025 Nov. 5];1(2):136-44. Available from: https://journal.fisika.or.id/index.php/jpsi/article/view/58