SG Heritage Dictionary

Tantalum [Noun] Webster's Dictionary 1828

Columbium, the metal obtained from tantalite, newly discovered.

Tantalum [Noun] Webster's Dictionary 1913

A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.

Tantalum Encyclopedia Britannica

TANTALUM. A rare element closely allied to Niobium. See vol. xvii. p. 513.

9th ed. Encyclopædia Britannica, vol. 23, p. 48
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