New Niobium Mineral Xianhuaite‑(Ce) Found at China’s Bayan Obo Deposit

A team led by Bo Yang discovered the new mineral xianhuaite-(Ce) in northern China’s Bayan Obo deposit. The authors—Yang, Yuan Xue, Li Yang, Ningyue Sun, Guowu Li, Junfang Yu, Guoying Yan, Jianyong Liu, Yonggang Zhao, Wenxiang Meng, Zhenyu Chen, Lei Chen, Ze Liu, Zhao Yan, Xinyu Hou, Xin Ao, and Jinlong Wang—published their findings together in 2026 in European Journal of Mineralogy ¹.

The study reports that xianhuaite-(Ce) contains potassium (K), cerium (Ce), and niobium (Nb). Using microscopes, chemical analyses, and X-ray measurements, the researchers determined its crystal structure and properties ¹.

Their work shows that this mineral records how rare earths such as cerium can become concentrated alongside niobium during geological processes, improving our understanding of how these important resources form ¹.