in hydrogen fluoride addition of KF to solution of HNbF6, prepared by dissolving Nb in aq. HF at 120 to 130°C;; washing with dild. aq. HF and alcohol, drying in vacuum;;
in hydrogen fluoride HF (liquid); (Ar); K2NbF7 dissolved in HF; pptd. by adding soln. of KCl; recrystd. from HF soln.; filtered; washed with ethanol; dried in vac. at110-120°C;
参考文献
Journal of Alloys and Compounds, , vol. 359, # 1-2 p. 244 - 255
