gadolinite

(gad′ō lin īt′)

noun

a dark green to black, hard, radioactive mineral, beryllium iron yttrium silicate, BeFeYSiO, that is an ore of various rare-earth elements

Origin: Ger gadolinit, after J. Gadolin (1760-1852), Finn chemist who isolated it

See gadolinite in American Heritage Dictionary 4

noun

A dark green or greenish-black silicate mineral, Be₂FeY₂Si₂O₁₀, containing several of the rare earths in combination with iron.

Origin:

Origin: After Johan Gadolin (1760-1852), Finnish chemist

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