REN Jian-hong, SHI Guang-hai, ZHANG Jin-hong, YUAN Ye, GAO Kong, WANG Mei-li, LI Xin-ling, LONG Chu. Infrared Spectra of Grayish Green Nephrite and Gray Nephrite: Characteristics and Significance[J]. Spectroscopy and Spectral Analysis, 2019, 39(3): 772