Min. [named after Ferguson (of Raith); see -ITE.] ‘A metaniobate (and tantalate) of yttrium with erbium, cerium, uranium, iron, calcium, etc.’ (Dana).
1827. Trans. Roy. Soc. Edinb., X. II. 271. Fergusonite, a new mineral species.
1873. Watts, Fownes’ Chem., 376. It has since been found in fergusonite.
