423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
1 | DF | TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15} |
62 | DF | .~ Group VB metal (V, Nb, or Ta) {4} |
65 | .~.~ Forming insoluble substance in liquid {2} | |
66 | DF | .~.~.~> Hydroxylating or hydrating |
67 | DF | .~.~.~> Ammoniating or sulfating |