Chem. [f. TANTALUM + -IC.] Of or derived from tantalum; in names of chemical compounds in which tantalum is pentavalent, as tantalic chloride, fluoride; tantalic oxide, anhydride, Ta2O5; tantalic acid, hydrated tantalic oxide, H2O . Ta2O5.
1842. Parnell, Chem. Anal. (1845), 70. After having been heated to redness, alone, tantalic acid is insoluble in all liquids.
1849. D. Campbell, Inorg. Chem., 273. A compound of this metal [tantalum] with oxygen—namely, tantalic acid—is found in the minerals tantalite and columbite of Bavaria and North America.
1877. Watts, Fownes’ Chem., I. 466. Tantalum, in its principal compounds, is quinquivalent, the formula of tantalic chloride being TaCl5 … and that of tantalic oxide (which, in combination with bases forms the tantalates), Ta2O5.
