Please refer to the attachment(s) for more details.
ZHENG Luo, GU Xuexiang, ZHANG Yongmei.2014. Pyrochlore Chemistry from the Bonga Carbonatite-type Nb Deposit, Huila Province, Angola: Implications for Magmatic-Hydrothermal Processes of Carbonatite.[J]. Acta Geologica Sinica(),88(z2):487-488