niobic, a. Chem.
(naɪˈəʊbɪk)
[f. niob-ium + -ic 1 b.]
Of or pertaining to, derived from, niobium; esp. in niobic acid or niobic oxide.
| 1845 H. Rose in Chem. Gaz. III. 36, I have called it Niobium, and its acid niobic acid. Ibid., The niobic acid remains colourless. 1848 Fownes Chem. (ed. 2) 310 The American tantalite contains niobic, pelopic, and tungstic acids. 1866 Watts Dict. Chem. IV. 49 It is remarkable..that niobic oxide cannot be formed from niobous oxide by direct oxidation. 1892 Morley & Muir Watt's Dict. Chem. III. 506/1 Niobic oxide, Nb2O5, reacts with alkali oxides to form salts. |