Members with the Letter X
- Xavier, Nuno -- Portugal -- Universidade de Lisboa
- Xiao, Ying-Kai -- China -- Chinese Academy of Sciences
- Xiaoxin, Zhu -- China -- Institute of Chinese Meteria Medica
- Xin, Xinquan -- China -- Nanjing University
- Xing, Baoshan -- United States -- University of Massachusetts
- Xiu-Rong, Pan -- China -- Nat'l. Research Ctr. for Certified Reference Materials
- Xu, Jianming -- China -- Zhejiang University