| Answer | Crossword Clue |
|---|---|
| niobates | NIOBATE, a salt of niobium |
| columbate | a salt of columbic acid; a niobate |
| columbates | COLUMBATE, a salt of columbic acid; a niobate |
| niobate | a salt of niobium |
| niobate | a salt containing an anionic grouping of niobium and oxygen |
