Definition of gadolinite in English:

gadolinite

Syllabification: gad·o·lin·ite
Pronunciation: /ˈgadl-əˌnīt
 
/

noun

A rare dark brown or black mineral, consisting of a silicate of iron, beryllium, and rare earths.
More example sentences
  • It is found with other rare earth elements in minerals such as monazite, cerite, gadolinite, xenotime, and euxenite.
  • The most common ores of holmium are monazite and gadolinite.
  • Like other rare earth metals, it is found in minerals such as cerite, gadolinite, and samarskite.

Origin

early 19th century: named after Johan Gadolin (1760–1852), the Finnish mineralogist who first identified it.

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