| 10 3 | | | niobobaotite | IMA CNMNC IMA 2022 | 127 a | | | | 20~80μm Ba Nb Ti Fe Cl | Ba4 Ti2.5Fe2 + 1.5 | Nb4Si4O28Cl I41a #88 | | 150 | 2023 | | | | | | | | | | |