noun gad·o·lin·ite \ˈga-də-lə-ˌnīt\

Definition of gadolinite

  1. :  a black or brown mineral that is a source of rare earths and consists of a silicate especially of iron, beryllium, yttrium, cerium, and erbium

Origin and Etymology of gadolinite

borrowed from French, from Johan Gadolin †1852 Finnish chemist and mineralogist + -ite 1-ite Gadolin wrote a description of the mineral based on a sample found at the Ytterby quarry on the island of Resarö in the Stockholm Archipelago, Sweden (“Undersökning av en svart tung stenart ifrån Ytterby stenbrott i Roslagen,” Kongl. Vetenskaps-Akademiens Nya Handlingar, vol. 15 [1794], pp. 137-55).

First Known Use: 1802

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