gadolinite
mineral
Quick Summary
Gadolinite is a black or brown mineral that serves as a source for rare earth elements. It is a silicate primarily composed of iron, beryllium, yttrium, and cerium. The mineral was named after Johan Gadolin, a Finnish chemist and mineralogist, who described it based on a sample from Sweden. Gadolinium, a magnetic metallic element belonging to the rare-earth group, is found in combination with minerals like gadolinite.12
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