tantalium

Or indium, niobium, vanadium or tantalium '], relying 100% on foreign imports.

Dr. Vladimir A. Masch: Staying in One of the Catbird Seats 2010

(proposed as an element in 1815: see Conversation XIX) “columbium or tantalium” = niobium and tantalum

Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments 1813