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铌含量高钽含量很少的烧绿石可直接溶解于氢氟酸生成金属氟化物或氟氧化物。显然该铌合物的组成取决于酸的浓度。用拉曼及~(19)F核磁共振光谱查明在约35%HF水溶液中出现H_2NbOF_5,而在25%HF浓度时出现
Pyrochlore with high niobium content and low tantalum content can be dissolved directly in hydrofluoric acid to form metal fluorides or oxyfluorides. Obviously the composition of the niobium compound depends on the acid concentration. The Raman and ~ (19) F NMR spectra revealed the presence of H 2 NbOF 5 in about 35% HF aqueous solution and at 25% HF concentration