Wang Xiao-Fei, Yang Hua-Jun, Zhang Ge, Zhang Qing-Li, Dou Ren-Qin, Ding Shou-Jun, Luo Jian-Qiao, Liu Wen-Peng, Sun Gui-Hua, Sun Dun-Lu. Measurement of refractive indices of GdTaO4 crystal by the auto-collimation methodJ. Acta Physica Sinica, 2016, 65(8): 087801. DOI: 10.7498/aps.65.087801