Definition of gadolinite
: 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 , pp. 137-55).
First Known Use: 1802
Learn More about gadolinite
Britannica.com: Encyclopedia article about gadolinite
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