Araya Mungchamnankit, Suwimon Nualpralaksana. The change of crystal field of Gd3+ in natural zircon with heat treatment in oxidizing and reducing atmospheres monitored by ESR spectroscopy . J. Curr. Sci. Technol. [internet]. 2019 Dec. 21 [cited 2025 Nov. 3];9(2):141-7. available from: https://ph04.tci-thaijo.org/index.php/JCST/article/view/450